Final answer:
The baby's liver and spleen consume the most energy, and this energy comes from the mother via the placenta. Energy production for a baby ties back to photosynthesis, which plants use to create the chemical energy found in food. Excess energy in humans is stored as glycogen or fat.
Step-by-step explanation:
The part of the baby that consumes the most energy is the liver and spleen, followed by the brain. The energy that a developing baby requires primarily comes from the mother via the placenta, which facilitates the transfer of oxygen and nutrients from the mother to the baby. Before birth, the fetus is not engaged in vigorous activities, hence most of its energy consumption is based on its basal metabolic rate (BMR), which sustains basic life functions and growth.
Energy is produced through the diet and digestion as organisms eat other organisms to access stored energy. This stored energy in food primarily originates from photosynthesis, the process by which plants convert sunlight into chemical energy. In the human body, excess carbohydrates and energy are stored as glycogen in the liver and muscles, and when that storage is at capacity, as fat in adipose tissues.