Answer:
The high elevation is the factor that explains why the majority of the Andes are located at and around the Equator but they have a cold climate.
Step-by-step explanation:
The first option is not correct because the Pacific Ocean doesn't bring cold weather conditions to the Andes.
The second option is not correct because El Nino is responsible for the cold climate in the Andes, instead, it brings higher temperatures.
The third option is correct because the Andes are very high, the highest mountain range in the Western Hemisphere, and among the highest in the world, so naturally, with such high elevation the climate is colder.
The fourth option is not correct because their location near the Equator increases their temperature, not making it colder.