Which of the following is a way the jet stream influences weather?

a: it changes the migration pattern of fish.
b: it causes ice to form deep below the surface.
c: it moves warm air around.
d: it melts the polar ice caps.

Need in all of themmm only answer if you know plsssss

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.