Question

Human activities have altered many natural environments ________. Many lands are now fields where only one farm crop is grown, an example of a(n)_______.
A. Invasive species
B. Pollutants
C. Deforestation
D. Monoculture
E. Smog
F. O-Zone layer

Answer 1

Human activities have altered various natural environments around the planet. Various lands are now fields where only one farm crop is cultivated, is an example of monoculture farming.  

An agricultural method of growing or producing a single plant, crop, or a livestock species, breed, or a variety in a field of the farming system at a time is known as a monoculture. Hence, the correct answer is option D, that is, monoculture.