Question

select the appositive or appositive phrase.

in the late 1980s, the soviet leader mikhail gorbachev instituted perestroika, which was a policy that included various economic and political reforms.

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Explanation:

An appositive phrase renames or identifies a nearby noun. Here, the phrase renames "perestroika" by defining what the term refers to.

Answer:

a policy that included various economic and political reforms