When does a change in energy occur? 1. in some physical changes, but not all. 2. in every physical change, but not in a chemical change. 3. in every chemical or physical change.

i think it's c. i'm not sure but i think so.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'