Complete the sentence in the most logical way by filling in the blank with either the preposition "a" or "de" followed by the de
finite article that matches the subject. (Be careful! Don't forget to form the contractions “al" and "del" when needed.) Examples:
Susana va a la escuela. (You would write a la since Susana goes to the school.)
Yo saco una foto de la ciudad. (You would write de la since I take a photo of the city.)
Yo saco fotos___________edificios más antiguos de Madrid.
Photosynthesis; photosynthesis does not occur in both plant and animal cells because plants use it to create energy using sunlight, among other materials, which animals are unable to do.
