In which sentence is the underlined phrase an adverb prepositional phrase?

some of the experiment on the space station helps in the design of new technology.

Explanation:

in the adverb prepositional phrase "in the design of new technology" is the object of the preposition in. this preposition shows the relationship between the verb 'help and design of new technology ' it also informs where " some experiment on the space station helps"

the second sentence is a great revision in my opinion. that would be a great topic.

explanation:

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.