Question

Bar•ren adj ˈber-ən, ˈba-rən

1: not reproducing: as a : incapable of producing offspring —used especially of females or matings b : not yet or not recently pregnant: habitually failing to fruit
2: not productive: as a : producing little or no vegetation : DESOLATE b : producing inferior crops c : unproductive of results or gain : FRUITLESS

A:adjective

B: adverb

C: noun

D:verb

Answer 1

The answer is a. adjective.

Adjectives are used to describe nouns, giving them attributes. Barren is an adjective that means whatever noun it is referring to can't reproduce or is fruitless.