Final answer:
Allocation of energy to reproduction reduces the amount of resources available for other functions.
Step-by-step explanation:
When energy is allocated to reproduction, it reduces the amount of resources available for other functions. This is because energy is required for growth, maintenance, and reproduction. For example, plants use energy to produce energy-rich seeds, while animals use energy for metabolism, parental care, and energy storage. Therefore, when energy is used for reproduction, there is less energy available for survival and other activities.