We express our love for each other by exchanging gifts.

Question

(for each other) Is that a prepositional phrase?

What is (by exchanging gifts)

Answer 1

This sentence has two prepositional phrases:

for each other
by exchanging gifts.

http://www.englishclub.com/grammar/prepositions-list.htm

http://www.chompchomp.com/terms/prepositionalphrase.htm