Humans are classified as heterotrophs. This means that we cannot produce our own food and instead rely on consuming other organisms, such as plants and animals, to obtain the nutrients and energy necessary for survival.
Unlike autotrophs, which can produce their own food using sunlight or inorganic substances (like plants doing photosynthesis), humans must obtain their food through external sources. We are not capable of synthesizing our own organic compounds from inorganic material.
Additionally, while some organisms, such as some bacteria, are known as chemoautotrophs because they derive energy from chemical reactions (often involving inorganic substances), this does not apply to humans.
Finally, primary producers refer specifically to organisms that produce organic material from inorganic substances, serving as a food source within the food chain. Humans do not fulfill this role since we rely on consuming these primary producers and other consumers.