Farming reduces the natural biodiversity of an area yet farms are necessary to feed the world’s human population. This situation is an example of

answer; ///(a) ;

i took a test for bio that had this question and these were the correct answers, not sure if this is any now lol

the nervous system and the muscular system work together.  

sweat reaches the surface of the skin and evaporates into the air.

muscles underneath the skin relax, causing hair on the skin to lay flat.