Answer:
Opening, cavern
Explanation:
Synonyms are words that have identical or nearly identical meanings. An example of synonyms are words <em>present </em>and <em>gift</em>. They mean the same thing and are interchangeable.
When synonyms are used in the same context and we aren't familiar with one of them, we can figure out what it means based on the other one. Words used in the given passage that help us determine the meaning of the word <em>grotto </em>are <em>opening </em>and <em>cavern</em>.
The correct answer is A. active voice.
When the subject performs a particular action, it means that the sentence is active rather than passive. If the object was the focus of the sentence, then it would be a passive sentence.
For example: I love reading books - active sentence
Books are written by writers - passive sentence
These sentences can be in future, past, or present tense - which means that tense is not important.
