Those who survive a hippocampal brain tumor in childhood are likely to have difficulty in adulthood. getting adequate sleep remembering new information maintaining body balance while walking experiencing feelings of fear

The correct answer is - remembering new information.

Explanation:

Hippocampus is a curved structure, small in size that is essential for the limbic system. These curved structure are two in the number. The hippocampus actually helps in making new memories and new emotion forming.

Survivors of hippocampal brain tumors have a problem remembering new things or forming new memories. It is considered as it is due to the reduced size of the hippocampus or because of radiation used in treatment.

Thus, the correct answer is - remembering new things.

The correct answer is - sea cucumber.

Explanation:

Hydra, aurelia, and sea anemone belong to Phylum - Coelenterata or cnidaria while sea cucumber is a member of echinoderms. Cnidaria is radially symmetrical, free-swimming or fixed, aquatic and solitary or colonial animals. While sea cucumber are animals like starfish or sea urchin.

They found on the seafloor and have pentaradial symmetry however, developes bilateral symmetry later.