Why will a set of stars appear at a different angle to us at different times of the year?
a. because we change location as earth orbits the sunb. because the stars move back and forth across the skyc. because of distortions by gravity

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.