Proofread the following sentences, which form an essay, for errors in the past participle. If the sentence contains a past participle error, select "Past participle error." If the sentence is correct, select "Correct." Environmentalists have began to realize that the bog, with its varied uses, must be preserve.

A) Past participle error
B) Correct

Past Participle

It indicates a completed action or state of the verb, and when combined with auxiliary verbs, it forms perfect aspect tenses.

Environmentalists

Individuals who advocate for the protection and preservation of the environment.

Bog

A wetland area that accumulates peat, a deposit of dead plant material—often mosses, and in a majority of cases, sphagnum moss.