______ is a major component of bones and the proteins that build muscles.

11 answers

Angie/Stephanie -- what are your choices? What is your answer?
it's fill in the blank
http://www.livestrong.com/article/402005-foods-that-help-the-bones-muscles-to-get-strong/

http://www.livestrong.com/protein-building/
carbon
Birds
Carbon
Chews
carbon
Calcium ?? Lmao!!!
carbon
carbon