Is the number of deer on the island a density-dependent or density-independent limiting factor for the wolf ?

It is density dependent.

Explanation:

Limiting factors, according to ecologists, are those that influence the size of a population. These factors are divided into dependent and independent. Dependent factors are those that influence mortality and birth rates in a population, in which case we can state that the number of moose on an island is a dependent limiting factor for the density of a wolf population.

This is because, wolves feed on moose, if the number of moose is small, the density of the wolf population will decrease because they will have difficulty feeding and consequently die. On the other hand, if the moose population is large, wolves will have abundant food and this will increase the density of the wolf population.

they deliver oxygen to the blood

the correct answer is c   with the systems