Question

The mule, ____________ the donkey, is a close relative of the horse.

Short answer

like

Step-by-step solution

Identify the Context of the Sentence

Note that the sentence is comparing a mule and a donkey, in relation to a horse. So, we are looking for a term that can establish a relevant comparison.

Understand the Relevant Vocabulary

Knowing the meanings and uses of comparative conjunctions like 'like', 'unlike' is crucial. 'Like' means similar to, 'unlike' means different from. Now we need to know if a mule is similar or different to a donkey in relation to being a close relative of a horse.

Apply Factual Knowledge

A mule is a hybrid animal, a cross between a female horse and a male donkey. So, a mule is 'like' a donkey in being a close relative of a horse. Therefore, 'like' is the correct word to fill the blank.