1) your muscles provide a framework that supports and protects your body? t or f? 2) when you breathe in and out, you're using your lungs? t or f? 3) when you eat food, it enters your digestive system? t or f?

blah

explanation: bc blah

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

looks like the answer is     c     to me!