Which reigion has the highest elevation.

Denali in Alaska is the highest mountain peak of the United States and North America.

Explanation:

he world’s tallest peak above sea level, the Mount Everest (pictured), also lies at the Sino-Nepal border. Besides these well-known topographical regions, China has high elevations over much of its topography with the average elevation of the country being 6,035 feet above sea level.

Explanation:

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.