Which organ system maintains posture and produces heat? a. muscluar b. nervous c. skeletal d. integumentary

Plss anybody know how to do this? ? i need the answers from a through d

In what direction does the medium move relative to the direction of the wave? explain.

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.