Which is an example of biodiversity contributing to the sustainability of an ecosystem? A meadow covers a large area of land, providing shelter to many organisms. The ocean can only support organisms that can survive salty conditions. One species of plant has been growing in a field for several years. Many kinds of fruit trees support a variety of birds and other animals in a forest.

The example of biodiversity contributing to the sustainability of an ecosystem is "Many kinds of fruit trees support a variety of birds and other animals in a forest."

Here's why:

1. "A meadow covers a large area of land, providing shelter to many organisms." This statement is about habitat, not biodiversity. While it's true that a meadow can provide shelter to many organisms, it doesn't necessarily mean there's a lot of biodiversity.

2. "The ocean can only support organisms that can survive salty conditions." This statement is about the specific conditions of a habitat, not biodiversity. It's true that only certain organisms can survive in salty conditions, but this doesn't speak to the variety of life in that habitat.

3. "One species of plant has been growing in a field for several years." This statement is about the longevity of a single species, not biodiversity. It doesn't indicate a variety of life.

4. "Many kinds of fruit trees support a variety of birds and other animals in a forest." This statement is a clear example of biodiversity. It mentions multiple kinds of fruit trees (plant biodiversity) and a variety of birds and other animals (animal biodiversity). This variety of life forms a complex, interconnected ecosystem where each species plays a role in supporting the others, contributing to the overall sustainability of the ecosystem.