The law of conservation of energy states that the Total Energy in a system will remain constant in an isolated system. Energy can only transfer. The law of conservation also states that energy can neither be created nor destroyed and that is a ambit concept in physics.
Some examples:
When a person eats, their bodies will convert chemical energy from food into mechanical and electrical energy so that the person can move.
Use an example of any machine, for example:
A blender transforms electrical energy into mechanical energy
Answer:
What causes the moon to change its appearance is that we see different amounts of the moon as it orbits earth.
Explanation:
Answer: C) They can contain contaminants that can enter the air during storms or high winds.
Explanation: A is wrong because I got it wrong (Sorry, can't give much explanation there).
B is wrong because water contamination does not directly relate to respiratory health.
D is wrong because fertilizers can impact respiratory health (Explanation seems lack-luster, but I feel like this is common sense).