What is the primary characteristic of a pollinator?

The primary characteristic of a pollinator is its role in facilitating the reproduction of plants. Pollinators, such as bees, butterflies, and certain birds, transfer pollen from the male anther of a flower to the female stigma of the same or different flowers. This process is essential for the fertilization of many plants, leading to the production of seeds and fruits. Pollinators are vital to the life cycle of flowering plants, and their activities enhance plant diversity and ecosystem health, which also supports food production.

In contrast, the other options do not accurately represent the primary function of a pollinator. While spreading invasive species, absorbing nutrients, and controlling pest populations are important ecological processes, they do not pertain to the core role of pollinators in plant reproduction. Pollination directly affects biodiversity and agricultural productivity, emphasizing its significance in natural and managed ecosystems.