No it is not. It is an adverb phrase since it lacks a subordinating conjunction.
Adverb clauses must be preceded or started by a subordinating conjunction such as after, if, because or although. For a sentence to qualify as an adverb clause it must include in its body a subject and a verb.
As a general rule you can use the following formula:
An adverb clause equals a subordinate conjunction plus a subject plus a verb, and it should be answering how? when? where? or why?
Answer:
Rebecca nurse
Explanation:
wife of Francis nurse in Salem
People give more detail im not going to repeat me
highlighting a benefit of taking action
featuring an important fact or statistic
providing a strategy for taking action