Question

multiple-choice question
why are the manatees dying?
lack of food (sea grass)
getting old
too much oxygen in the water
predators
rewatch

Explanation:

Manatees primarily feed on sea grass, and widespread loss of their sea grass habitat due to water pollution, coastal development, and algal blooms has led to mass starvation and death. Old age is a natural cause but not a driver of large-scale die-offs; manatees do not face issues from excess oxygen, and they have very few natural predators that cause significant mortality.

Answer:

lack of food (sea grass)