Essential Part - Verbal and Reasoning

Directions to SolveA good way to approach this type of question is to use the following sentence: "A ______ could not exist without ______.". Find the word that names a necessary part of the underlined word.
Q1:

glacier

A mountain

B winter

C prehistory

D ice

ANS:D - ice

Explanation: A glacier is a large mass of ice and cannot exist without it. A glacier can move down a mountain, but it can also move across a valley or a plain, which rules out choice a. Glaciers exist in all seasons, which rules out choice b. There are many glaciers in the world today, which rules out choice c.