Final answer:
Elderly, infants, pregnant women, and individuals with compromised immune systems have an elevated risk from zoonoses due to factors such as weaker immune responses or underlying health conditions.
Step-by-step explanation:
The populations that may have an elevated risk from zoonoses are indeed all of the above: the elderly, infants, pregnant women, and any individuals with compromised immune systems. These populations are notably more susceptible to infectious diseases due to various factors such as less robust immune systems in infants and the elderly, altered immune responses in pregnant women, and weakened defense mechanisms in those with underlying health conditions or undergoing certain medical treatments.