A horse of mass 100kg stood on a hill 1.3m high. Calculate the potential energy of the horse while standing on the hill.

Here are the answers to the questions:

Question (about water conservation): To conserve water usage at home
A. Take shorter showers
Taking shorter showers reduces the amount of water consumed, contributing to water conservation.

Question (about respiratory and circulatory systems): The respiratory and circulatory systems work together by
C. transporting oxygen and nutrients throughout the body
The respiratory system takes in oxygen, which is then transported by the circulatory system to all body cells. The circulatory system also transports nutrients absorbed from the digestive system to the cells.