To which category do nuts, seafood and pollen belong?

Allergens.

Explanation:

Allergens are the substances that can enter in the body and causes the allergic reactions. The allergens are responsible for the hypersensitive reactions of the body.

The pollen, nuts and seafood acts as allergen for some individual. These substances causes the exaggerated immune response and allergic reactions in the sensitive individuals. The body generates an immune response against that allergen substances.

Thus, the answer is allergen.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls