If you wanted to demonstrate homeostasis to a friend, you could use as an example

An organism maintaining nearly constant internal conditions.

Explanation:

Hope this helps you :D

the correct answer in apex is tissue development, i know because i just had this question

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.