Câu 3: Choose the letter to indicate the best option for each of the questions.1.The red squirrel in England is in danger of ________.A.growthB.extinctionC.damageD.destruction5.Naturally, many different species in this freshwater ecosystem share the same kind of ________.A.animalsB.foodC.plantsD.weather6.The national park was established to ______ the ecosystem of the limestone forests.A.attackB.abandonC.protectD.give up9.Ecotourism is a useful tool to manage and ______ natural and cultural landscapes.A.desertB.useC.releaseD.conserve14.Saltwater invasion can be quite _______ to coastal farmers who depend on fresh groundwater for livelihood.A.dangerB.endangerC.dangerousD.dangerously16.Scientists have been studying different ecologies _______ the 20th century.A.forB.sinceC.inD.by18.These animals consume the local vegetation, which helps reduce the ______ of wildfire.A.riskB.chanceC.opportunityD.case19.The search for the new kind of penguin in Antarctica has been ______ international media attention.A.attractB.attractedC.attractingD.to attract20.Some people ________ down lots of trees along the river for the past two weeks.A.cutB.are cuttingC.have been cuttingD.have cut21.The negative effects of eco-tourism occur when visitors go beyond the environment ________.A.protectionB.importanceC.destructionD.limit

Câu 5: Choose the best answers to complete the sentences.2.With so many different species of plants and animals, the ________ of the area is amazing.A.biodiversityB.conservationC.tropical forestD.habitat7.It is our responsibility to ________ our planet's ecosystems.A.serveB.preserveC.impactD.destroy9.Pangolins and tigers are some of the animals that are ________ to Viet Nam.A.endangeredB.tropicalC.nativeD.natural11.Many of our favourite foods such as chocolate and coffee come from ________.A.wildlifeB.nature reservesC.natural parksD.tropical forests

5 .Which of the following are in the red-listed category?Endangered and vulnerable speciesHighly populated speciesEither (a) or (b)Neither a nor b

A(n) ______ species is likely to become extinct, while a(n) ______ species is at risk but not as critically.Multiple choice question.endangered; invasivevulnerable; keystoneendangered; vulnerablethreatened; extinct

Question 1What are the three greatest proximate threats to biodiversity?  1 pointhabitat loss, overharvesting, introduction of exotic species  overuse of natural resources, not enough planting of vegetables, too much meat consumption  over hunting, global warming, lack of rain  2.Question 2Aquatic species are particularly threatened by overharvesting. 1 pointTrueFalse3.Question 3Buying domestic wood species is one way to help prevent habitat destruction. 1 pointTrueFalse4.Question 4Why does the speaker mention the brown tree snake in Guam?1 pointas an example of an animal that is affected by the bush meat trade  as an example of exotic species that has been responsible for the extinction of native species  as an example of a native species that has become extinct  5.Question 5An overabundance of fresh water could result from the effects of global warming. 1 pointTrueFalse

Island ecosystems are particularly susceptible to the negative effects of invasive species because native species have often evolved without Blank______.Multiple choice question.predatorscompetitorspreyresources