When you move your muscles, chemical energy in the cells is converted into mechanical and thermal energy. What is this an example of?
A. Law of nutrition
B. Law of conservation of energy
C. Theory of photsynthesis
D. Theory of kinetics

please help!

B.Law of conservation of energy

Explanation:

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

plz mark me as brainliest :)

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.