instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: What occurs at joints? Answer: body movements
answer:
Movements of the body occur at joints. Describe how muscles are arranged around the joints of the body.

question:
Question: What does a healthy immune system fight off? Answer: infections and other dieases
answer:
Eat well, get enough sleep, and be active every day. These healthy lifestyle choices will help keep your immune system healthy so it can fight off respiratory infections and other diseases.

question:
Question: Depending on how matter interacts with light, it can be classified as transparent, translucent, or what? Answer: opaque
answer:
Matter can be classified as transparent, translucent, or opaque depending on how it interacts with light.