Question 49: In the preparation of fibrous material for production uses, stiff woody fibers from plants _______________fibers from animal sources.

Comparison of nouns:

– Compare equals: S + V + as + much/many/little/few + N + as + N/Pronoun

Eg: He has as many friends as I (do). (He has more deadlines than me.)

– Superlative: S + V + more/ fewer/ less + N + than + N/Pronoun

Eg: February has fewer days than March. (February has fewer days than March.)

– Superlative: S + V + the most / the fewest/ the least + N.

Eg: He earns the most money. (He makes the most money)

There are the fewest days in February. (There are few days in February.)

=> Answer D (In the preparation of fiber materials used for production, hardwood fibers from trees require more heat than fibers obtained from animals.)