Man has been tampering (126) ecosphere for a very (127) time and is forced to (128) that the environmental resources are (129). Environmental problems are (130) social problems. They begin with people as (131) and end with people as victims. Unplanned uses of resource (132) in the depletion of fossil fuels and (133) of air and water, Deforestation has led to (134) imbalance and draining away of national wealth (135) heavy expenditure on oil and power generation.

Options

A. by
B. in
C. out
D. through

Answer

D

Explanation

through (Prep.)