The muscles of the muscular system keep bones in place; they assist with movement by contracting and pulling on the bones. To allow motion, different bones are connected by joints which are connected to other bones and muscle fibers via connective tissues such as tendons and ligaments.
Answer:
when carbon dioxide level goes up.temp. goes down.and vice versa
4th one
they travel to go where the season's right, which'll give them the best resources
