It is also easy to overlook the services that ecosystems provide humanity. They enrich the soil and create the very air we breathe. Without these amenities, the remaining tenure of the human race would be nasty and brief. The life-sustaining matrix is built of green plants with legions of microorganisms and mostly small, obscure animals—in other words, weeds and bugs. Such organisms support the world with efficiency because they are so diverse, allowing them to divide labor and swarm over every square meter of the earth’s surface. They run the world precisely as we would wish it to be run, because humanity evolved within living communities and our bodily functions are finely adjusted to the idiosyncratic environment already created.

The author tries to persuade the reader to agree with his claim about the importance of ecosystems by

A. providing facts
B. presenting statistics
C. restating his claim.
D. using deductive reasoning.

One of the key responsibilities and aims of an author is to make the readers believe in the idea or thought conveyed. The authors employ several techniques to convince, motivate, or inform the readers about a particular viewpoint or thought. The author of this excerpt employs facts which is one of the effective techniques to persuade the readers as it helps them to relate the claim presented by the author logically and which ends in evoking the desired response from them. The author states the offerings of the ecosystem to us which is factual. Thus, the author is providing facts to establish his claim that humans overlook the services of the ecosystem.