Answer:
sorry if i get it wrong its been a long time since i did this i believe its nucleus
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.
A.<span> Air pollution............................</span>
It is a rare genetic mutation that both the maternal and paternal partners have to be at least a carrier for the albinism gene.