Read the passage given below and answer the question that follows.
One day recently as I entered the park, I lifted a piece of bark from a fallen log (permission from a ranger) and saw three tiny symphylans, another group of reclusive insect like creatures on which the collembolan-hunting ants sometimes feed. These creatures, belonging to a special group of symphylans called japygid have a pair of pincers on their rear ends. Although there are many species of these worldwide, very little is known about any part of their biology. What is their preferred food, what is their life cycle, why are these pincers in such an unusual position? I have no idea. Nor can I, or any other biologist, guess what would happen if all were to disappear. What I thought at the moment was that if I had another lifetime to live, I could easily devote it to symphylans.
Consider in the same light the different kinds of flies alone you would capture in a field on a summer day by simply sweeping a butterfly net back and forth through the vegetation. (Try it; you'll be amazed.) Then ponder further, if you will, that the species are variously specialized to feed on particular kinds of fruit, or pollen, or fungi, or scat, or dead bodies, or, if you let them, your own fresh blood. Some flies are parasites on other insects_ and not just any insects, but one to several species on which they are specialized out of thousands available. When as a teenager I had this epiphany, and I almost became a dipterist, an entomologist who studies flies. I was mesmerized by delicate little flies of the family Dolichopodidae, glistening all over in metalic blues and greens as they displayed themselves on plant leaves in the summer sunshine.
A suitable title for the passage can be:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Symphylans and flies
The passage has two parts: the first describes the tiny symphylans under the bark, about which so little is known that the author could devote a lifetime to them; the second describes the endless variety of flies in a summer field and the author's boyhood fascination with them. A title naming both covers the whole passage.
Why the Other Options are Incorrect?
Option 2: Snakes and parasites — Incorrect. Only partly true: no snakes appear in the passage, and parasites come up only as one kind of fly.
Option 3: Plants and logs — Incorrect. Wrong focus: the fallen log and the vegetation are only the places where the creatures are found.
Option 4: Humans and cow — Incorrect. Wrong focus: the passage is about small insect-like creatures; humans and cows are not its subject.