67. What is the meaning of the word 'mammoth' as it is used in the fourth paragraph?

Answer: D

Explanation:

Massive

In the context of the extract, the word 'mammoth' refers to the enormous potential energy of Niagara Falls, indicating something of great size or extent.

A) Dangerous

This option is incorrect as 'mammoth' does not imply any sense of danger. Instead, it describes a large or significant aspect, which is unrelated to threats or risks.

B) Raw

'Raw' suggests something in its natural state or unprocessed, which does not align with the context. The extract emphasizes the vastness of energy harnessed, rather than its unrefined quality.

C) Unused

The term 'unused' indicates something that has not been utilized, which is not applicable here. The extract highlights the potential energy that was actually harnessed, not energy that remained untapped.

D) Massive

This option is correct as 'mammoth' is synonymous with 'massive', indicating the large scale of energy derived from Niagara Falls. This aligns perfectly with the description of harnessing significant power.

Conclusion

The term 'mammoth' effectively conveys the immense scale of the energy from Niagara Falls, making 'massive' the definitive correct answer. The other options fail to capture the intended meaning, focusing instead on characteristics unrelated to size or extent.