Study these diagrams. The dots represent valence electrons orbiting the nucleus of an atom. Which diagram shows the valence electron pattern for a carbon atom? Four options A, B, C, and D showing different atomic structures with a nucleus at the center and valence electrons in circular path

The image having four outermost (valence) electrons and a nucleus at the center

Explanation:

Even though the images were not displayed in the question, but we know that carbon is a member of group 14 in the periodic table.

Every member of this group possess four electrons on their outermost or valence shell in addition to the nucleus at the center of the atom.

Hence the structure having four outermost electrons and a nucleus represents carbon atom.

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.

a. by using fur or clothes to trap heat energy near the body