What determines how much energy a human can receive from food? a) how much nitrogen the food contains b) how much the food molecules weigh c) how much energy the food molecules have d) how much oxygen the food contains

How much energy the food molecules have is the correct answer.

The presence of molecules determines amount of energy a human can receive from food. Food molecules have macromolecules such as carbohydrate, protein and fat which release energy when broken down into simpler molecules with the help of enzymes. The food we eat has these macromolecules which is used as a fuel for running the body so we can conclude that food molecules have energy.

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when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave