I think it is carbohydrates
Answer:
conservation of natural resources
Explanation:
You're trying to save resources, all the other options cause harm
Answer:
Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes. Some examples of polygenic traits are height, skin color, eye color, and hair color.
Think it's C since joints connects two bones together and marrow is inside bones.
