Answer:
A parasitic relationship is one in which one organism, the parasite, lives off of another organism, the host, harming it and possibly causing death. The parasite lives on or in the body of the host. A few examples of parasites are tapeworms, fleas, and barnacles. The fleas, in turn, get food and a warm home.
Animals would be out, because they do not produce their own food.
Fungi decompose other matter and break it down to get glucose and other minerals. They do not produce food either.
Protists are the 'odds and ends' kingdom. Some protists are plant-like, animal-like, or fungus-like. So it wouldn't contain ONLY producers.
The answer to this would be Plants because they generate their own food through the process of photosynthesis, creating glucose in photosynthesis and breaking it down for energy in cellular respiration.
A molecule is a group of bonded atoms. Answer a, b, and c all have molecules. For example H2O has the molecule H2 in it. The only compound that doesn't share this trait is answer d: NaCl.