Human activities have altered many natural environments many lands are now fields where only one farm crop is grown, an example of a( a. invasive species b. pollutants c. deforestation d. monoculture e. smog f. o-zone layer

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.  

the answer is 1. photosynthesis. glad to

i am going to guess that it is co2.