Question:easy

Passage:

Insects' lives are very diminutive and they have many enemies, but they must survive long enough to rear and perpetuate their kind. The less insect-like they look, the better their probability of survival. To look "uneatable" by resembling or imitating plants is a deceit widely practised by insects. Mammals hardly ever use this kind of camouflage, but many fish and invertebrates do.

The stick caterpillar is well named. It is hardly discernible from a brown or green twig. This caterpillar is quite familiar and can be found almost anywhere in North America. It is also called "measuring worm" or "inchworm." It walks by arching its body, then stretching out and grasping the branch with its front feet then looping its body again to bring the hind feet forward. When danger threatens, the stick caterpillar stretches its body away from the branch at an angle and remains rigid and still, like a twig, until the danger has passed.

Walking sticks, or stick insects, do not have to assume a rigid, twig-like pose to find protection; they look like inedible twigs in any position. There are many kinds of walking sticks, ranging in size from the few inches of the North American variety to some tropical species that may be over a foot long. When at rest their front legs are stretched out, heightening their camouflage. Some of the tropical species are adorned with spines or ridges imitating the thorny bushes or trees in which they live. Leaves also seem to be a favorite object for insects to imitate. Many butterflies can suddenly disappear from view by folding their wings and sitting quietly among the foliage that they resemble.


Question: What is the main theme of the passage?

Show Hint

Notice that every example in the passage, the stick caterpillar, walking sticks, and butterflies, is about looking like something else to avoid predators.
Updated On: Jul 20, 2026
  • Life cycle of insects
  • The feeding habits of insects
  • Camouflage techniques in insects
  • Mode of survival in mammals
  • Tropical species of insects
Show Solution

The Correct Option is C

Solution and Explanation

A quick way to find the main theme is to ask what single idea ties every paragraph together. Paragraph one introduces the concept that looking inedible helps insects survive. Paragraph two gives the stick caterpillar as an example of an insect that freezes into a twig-like pose when threatened. Paragraph three extends the idea to walking sticks, which always resemble twigs or thorny plants, and to butterflies that vanish among foliage by folding their wings. None of the paragraphs talk about how insects grow, reproduce, or feed, and mammals get only a passing one-line mention, so options about life cycle, feeding habits, or mammal survival do not fit the whole passage. Tropical species are only a small supporting detail, not the main subject. Since disguise and imitation for survival run through the entire passage, the main theme is camouflage techniques in insects, option (c).
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