Answer:
slowing metabolism
Step-by-step explanation:
Metabolism is the chemical reaction that take place in the body in order to keep it alive.
Metabolism is determined by how many calories a person burns per day and the type of food a person eats is a key factor.
The speed or the rate of metabolism is influenced by age. The more a person ages the slower their rate of metabolism. That is why it is easier for a person to gain weight as they age due to slow metabolism.
Therefore, adults would need to alter their daily activities and include exercising to help burn excess calories fro the body and maintain optimal health.