Why Do We Have Storage Macromolecules, Such as Fats, in Our

Why do we have storage macromolecules, such as fats, in our bodies?

A) Macromolecules, such as fats, are a convenient way to store kinetic energy.
B) Human cells can directly capture the energy of sunlight through photosynthesis and store it as macromolecules such as fats.
C) Breaking down macromolecules, such as fats, is an endergonic process.
D) We can break down these macromolecules to provide energy for the endergonic reactions in our bodies.