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.

[Q]: Question: What does a healthy immune system fight off? Answer: infections and other dieases
[A]: 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.

[Q]: Question: What type of ions do ionic compounds contain? Answer: positive and negative
[A]: An ionic compound contains positive and negative ions.

[Q]: Question: What basic structure holds plants upright, bears leaves and other structures, and transports fluids between roots and leaves? Answer: stem
[A]:
Stems hold plants upright, bear leaves and other structures, and transport fluids between roots and leaves.