Which 4 of the following terms are often used when describing microorganisms that are a normal part of your body and not causing a disease.

1. Commensal: This term refers to microorganisms that live in a certain environment (like the human body) without causing harm. They exist in a symbiotic relationship with the host, where they can benefit without negatively affecting the host.

2. Symbiotic: This term is used to describe a relationship between two different organisms where both benefit. In the context of microorganisms in the human body, they can help with processes like digestion, while the body provides a suitable environment for them to live.

3. Resident Flora: This term refers to the microorganisms that are normally found in certain areas of the body, like the skin or gut. They are a normal part of the body's ecosystem and do not cause disease under normal circumstances.

4. Mutualistic: This term is similar to symbiotic, but specifically refers to a relationship where both organisms benefit. For example, certain bacteria in the gut are mutualistic because they help with digestion and in return, the body provides them with a place to live.

The question seems to be incomplete as it does not provide a list of terms to choose from. However, generally, the following four terms are often used when describing microorganisms that are a normal part of your body and not causing a disease:

1. Commensal: These are microorganisms that benefit from living on or in our bodies but do not cause harm or disease. They live in a symbiotic relationship with us.

2. Symbiotic: This term refers to a relationship between two different organisms where both benefit. In the context of microorganisms in our body, they help us digest food, produce vitamins, and protect against harmful microbes.

3. Normal Flora: This term refers to the microorganisms that are normally found in and on our bodies. They are not harmful under normal conditions and can even be beneficial.

4. Probiotics: These are live bacteria and yeasts that are good for our health, especially our digestive system. We usually think of bacteria as something harmful, but our body is full of bacteria, both good and bad. Probiotics are often called "good" or "friendly" bacteria because they help keep our gut healthy.