Directions: In this section there are short passages. After each passage you will find questions based on it. Answer them based on the contents of the passage and the opinion of the author only.

PASSAGE I

Popular illusions about birds extend further than the use of the word 'egg-shape' that would suggest that all eggs are alike. For instance, there is the popular idea that owls hoot. Actually, only very few owls hoot and these include the common brown or tawny wood owl. The white barn owl screeches; the little owl has a wailing cry; the long-eared owl barks; and the short-eared owl snorts! Another mistaken idea is that all ducks 'quack', because the common farmyard duck is a domesticated form of the common wild duck or mallard that quacks. Actually most wild ducks call with whistles.

The main purpose of this passage is