Which is a prepositional phrase used in the following sentence?

in march i love sitting under the oak tree and seeing the bird nests in its branches.

a. in march
b. i love sitting
c. seeing the bird nests

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.