We wrote in our journals for twenty minutes each day. which type of phrase or clause is underlined in the sentence?
adjectival clause
adjectival phrase
adverbial clause
adverbial phrase

in our journals is underlined

The correct answer is adverbial phrase.
First of all, it cannot be a clause because there is no verb there - clauses have to have a finite verb in them, whereas phrases do not; thus, the underlined part is a phrase. Second of all, adverbs usually describe the location, or time, or the manner of how or where or when something is done, which is the case here, so it has to be an adverbial phrase, not an adjectival one - because it doesn't describe a noun, but rather denotes where the action of writing is taking place.

There is no picture or writing