Read the sentence .the stimulus in the experiment caused the plants to grow which type of phrase or clause is underlined in the sentence

A noun phase
B verb phrase
C adjectival phrase
D adverbial clause

Objective pronoun is the answer.

Question is ambiguous. depends on what your teacher defines as important and as a developed and mature writer, there is no key to an effective argument. this is why we learn the rules so that we can break them in order to make our own effective arguments.maybe try ethos, pathos, and logos. : )