Final answer:
Archaebacteria are microorganisms that play important roles in nutrition as both producers and consumers. They obtain energy by breaking down molecules and some can also use sunlight. They form mutualistic relationships with their hosts and assist in food digestion.
Step-by-step explanation:
Archaebacteria are a group of microorganisms that play important roles in nutrition as both producers and consumer
Most archaea are chemotrophs and obtain their energy and nutrients by breaking down molecules in their environment.
Some species of archaea are also photosynthetic, using sunlight as an energy source. Unlike bacteria, archaea do not act as parasites, but instead, they form mutualistic relationships with their hosts, such as helping with food digestion.