Let's define what autotroph means:
Autotrophs are organisms that have the ability to create their own food using their surrounding atmosphere and sunlight. An example of an autotroph would be plants, where they intake carbon dioxide, water, and sunlight to produce oxygen and glucose.
Applying it to the context of the problem:
Kudzu (an invasive species) is an autotroph, meaning that it makes its own food from sunlight.