Which term describes the maximum number of individuals an ecosystem can
support over time for a given population?
a. life span
b. death rate
c. immigration rate
d. carrying capacity

Answer:

(D) Carrying capacity describes the maximum number of individuals an ecosystem can  support over time for a given population

Explanation:

The population size which can be supported indefinitely upon those service and resources which is available in ecosystem. These factors affect carrying capacity.

(1) The quantity of resources which is available In ecosystem.

(2) Population size and

(3) The amount of resource which is consumed by each individual  

In a habitat, carrying capacity is different for each species. The reason behind it is the requirement of their food, shelter is different. When there is a lack of availability of food, then the population present there will decrease eventually.  

"d.) carbon dioxide and hydrogen sulfide"