Altitude is best described as:

Altitude refers specifically to the height of an object or point above a reference point, typically above sea level. This measurement is crucial in many fields, including environmental science, as it can significantly influence climate, weather patterns, and the types of ecosystems found in an area. For instance, as altitude increases, temperatures typically decrease, which can affect vegetation types and habitats.

The concept of altitude is distinct from other factors such as vegetation types, geological measurements, or soil nutrient content, which are focused on different aspects of the environment. Understanding altitude helps in assessing environmental conditions and the potential impact on biodiversity and ecology.