Answer: Force
Explanation: Force is defined as a push or pull acting on an object
a. work is the time it takes to move an object once acted upon by a force
The molecules of ice stick together in the process of cohesion. They are tightly packed so there isn't much room to move. Liquid water is a looser hold. The molecules can go past one another, and they will take the shape of whatever container they occupy. Water vapor is loosely contained, and it will will fill whatever container it is kept in, and it will take its shape, too.
Circularity system........…….......