Final answer:
The biggest feature affecting Mexico's climate is altitude. Proximity to the sea and latitude also have an impact, but altitude is the most significant factor.
Step-by-step explanation:
The biggest feature affecting Mexico's climate is altitude. Mexico's terrain varies greatly, with high mountains and plateaus, which influence temperature and precipitation patterns. As altitude increases, the temperature decreases, leading to cooler climates.
While proximity to the sea does have an impact on Mexico's climate, it is not the biggest factor. Coastal areas usually experience milder temperatures due to the ocean's moderating effect.
Latitude also plays a role in Mexico's climate. The country is located in the tropical and subtropical zones, resulting in warm climates in most regions.
Learn more about Mexico's climate