The oven's interior reflects heat onto the food. The oven's interior, like a lens, focuses heat onto the food. Water molecules in the food reflect energy from microwave radiation. Water molecules in the food absorb the energy of microwave radiation.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following describes how a microwave oven heats food?
Possibilities:
- The oven's interior reflects heat onto the food.
- The oven's interior, like a lens, focuses heat onto the food.
- Water molecules in the food reflect energy from microwave radiation.
- Water molecules in the food absorb the energy of microwave radiation.

Water molecules in the food absorb the energy of microwave radiation.