Which term refers to a tree that retains its leaves for multiple years?

The term that describes a tree that retains its leaves for multiple years is "evergreen." Evergreens are characterized by their ability to maintain foliage year-round, unlike deciduous trees, which lose their leaves seasonally, usually in response to environmental factors such as temperature changes and daylight length.

Evergreen trees include species such as pines, spruces, and firs, which can withstand various climatic conditions while keeping their leaves (usually needle-like or scale-like) throughout the year. This adaptation allows them to photosynthesize continuously, contributing to their survival in diverse habitats.

In contrast, the terms "annual" and "perennial" are more aligned with plant life cycles than tree types. Annuals complete their life cycle in one growing season, while perennials live for multiple years but do not necessarily retain leaves year-round. Therefore, "evergreen" accurately describes trees that keep their foliage for an extended period, distinguishing them from other types of trees.