Why dose microwave oven heats up a food item containing water molecules most efficiently?

Why does microwave oven heats up a food item containing water molecules most efficiently?

Why does microwaves oven heats up a food item containing water molecules most efficiently?

Why does microwave oven heats up a food item containing water molecules most efficiently ?

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is