Question

Which is the adverbial phrase in the sentence?

Answer 1

old and new families is an adverbial phrase because old and new are adverbs that describe what kind of family they are

Answer 2

Answer:

in the picnic activities

Explanation:

An adverbial phrase is a group of words that functions as an adverb in a sentence.  Many types of word groups can be used as adverbial phrases.  Prepositional phrases are often used adverbially, and that's what we have in this sentence.

The prepositional phrase in the picnic activities is an adverbial phrase because it is modifying the verb joined.