Answer:
B. Mixture
because air,sea water and alloy are example of Mixture
It is a physical change because you can not put it back like it was
Atomic mass. Which is the number of protons and neutrons combined.
Explanation:
Fertilizers are chemically synthesized plant nutrients.
Nitrogen (N), Phosphorus (P) and Potassium (K) are macronutrients and are required in large amounts by plants. So, farmers use fertilizers in order to supply these nutrients. NPK 15:15:15 , NPK 20:20:20, NPK 15:30:15 are examples of fertilizers used to supply N, P, K to crops.
The two types of energy changes that occur are heat and light changes.
