What would be a limiting factor in an ecosystem?
a. nutrients and u. v. light
b. nutrients and space
c. u. v. light and space
d. population and nutrients

D. population and nutrients  

Explanation:

A limiting factor is a biological or physical factor which is capable of limiting the growth, abundance and distribution of the population of the species in an ecosystem.

Population and nutrients can be considered as two limiting factors because of the fact that with an increase in the population of the species, can be attractive to the predators and impact of a disease will more profound as it will spread among the large members of the population. Hence, the growth and abundance of the members of the species will be limited with the rise in population. Also in the scarcity of nutrients the population will decline.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.