Think back to the last lesson we covered. What is the difference between revolution and rotation of a planet?

Revolution refers to movement around another object whereas rotation refers to the spinning of an object.

Explanation:

Revolution is defined as the movement of one object around another object whereas rotation is defined as the spinning of an object about its own axis. In revolution the object moves from one place to another around another object while on the other hand, in rotation the object does not moves from one place to another but rotates at one place.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

correct answer is a. and d.