Since bees and butterflies both pollen are flowers, the growth (population) of flowering plants would become less common without the pollen being spread.
Natural selection is the correct answer
Answer: Basal metabolic rate
Explanation: Basal metabolic rate is the rate at which the body consumes energy per unit time by endothermic animals at rest.
Basal metabolic rate is the amount of energy expended per unit of time to keep the body functioning even at rest.
The energy consumed by the body at rest to keep various involuntary body functions active is termed Basal metabolic rate. These involuntary body functions include breathing, heartbeat, etc.
The diaphragm,
During inhalation, the diaphragm is contracted which increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity