Answer :
"(a)the preservation and protection of land and other natural resources for enjoyment
by future generations" is the best answers. Economic factors play a small role in this type of environmentalism.
The answer is: A. the preservation and protection of land and other natural resources for enjoyment by future generations
Conservation movement believe that our natural environment has the ability to maintain the balance in the ecosystem.
Human intervention would causes a lot of changes in the ecosystem that disrupt that balance (such as cutting down trees in order to build properties) . Because of this, they advocated for preservation and protection of land and other natural resources in order to prevent the destruction of the ecosystem.