Billy expands when his fuel starts to run out. He isn't as hot on the surface anymore, which makes him red, and he is many times larger than he used to be. He is now called a red giant.

Select the correct answer. which is the safest and most effective way to get a deeper stretch? a. massage the muscles being stretched b. inhale and push the stretch until it hurts c. lean into the stretch as you exhale d. place ice on your muscles before stretching