The tense of a verb<span> is determined by when the action took place. The three tenses are: pass, present, and future tense</span>
they wore wool and leather
it kept the haida safer
it made them depend on each other
trade
The correct answer is B. Clause.
Phrases don't have predicates so it's not a phrase and complexity is out of the question when talking about a simple, single clause. Adverbs are single words but adverbial clauses or adverbial phrases exist as well.
