Read the following sentence and select the correct rule for using the preposition por. caminamos por la playa. "on behalf of," "for the sake of," "in place of" for an "exchange" "during" or "for" when referring to length of time "along," "by," "through"

"along," "by," "through"

Explanation:

The sentence "caminamos por la playa" can be translated to  "we walk along/through/by the beach", it depends on the context.

The preposition por has many different uses, one of them is to describe travel or motion. Por is used to refer to travel or motion through a place or location. So in this case, the sentence is referring to a motion (walk) through a place (the beach).

c. its asking which of the words need an accent mark. its spelled biografía