Question

giant dust plumes from the sahara desert that blow across the atlantic ocean can have complex and opposing effects on tropical cyclones. on one hand, the dust can enhance the formation of ice clouds in the cyclones core, increasing precipitation.

____ the dust can lower sea surface temperatures around the cyclones core, weakening the storm.

which choice completes the text with the most logical transition?

a. on the other hand,
b. previously,
c. for example,
d. in other words,

Explanation:

The text presents two opposing effects of dust on tropical cyclones. "On one hand" is used to introduce the first effect. Logically, "On the other hand" is the appropriate transition to present the contrasting second effect. "Previously" (relating to time), "For example" (introducing an instance), and "In other words" (rephrasing) do not fit the context of presenting two contrasting points as well as "On the other hand".

Answer:

A. On the other hand