Which statement describes a forest ecosystem that has not experienced any natural disasters in the past 100 years? A.
The types of plants that grow in the forest are changing from year to year.
B.
Faster growing conifers are replacing slower growing deciduous trees.
C.
The types of plants and animals that live in the forest are reasonably stable.
D.
The number of types of animals that live in the forest is rapidly increasing.

the correct answer would be C

Explanation:

sorry if im wron

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.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: