Within food chains, matter is ___ • always recycled from one chemical form into another
• constantly increasing
• constantly decreasing
• always changing from one element to another

Explanation:

I think first option is correct one.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics