Researchers have suggested that people can be divided into chronotypes. A chronotype identifies an individual as a(n)

morning type or an evening type

Explanation: According to research, a chronotype identifies an individual as a morning type or an evening type. By definition, a chronotype is the natural disposition of an individual to be more alert or lethargic at different times of the day (especially in the morning or in the evening), depending on a variety of factors associated with circadian rhythms (the 'internal body' clock that regulates the 24-hour cycle of biological processes in both animals and plants).

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

your answer should be c) enjoy!