Animals with radial symmetry get information

a. from sense organs concentrated in their heads.

b. from all directions.

c. from specialized nerve cells in their brains.

d. from motor neurons.

A. From sense organs concentrated in their heads.

Explanation:

Hello,

Since animals with radial symmetry have body parts arranged around a central point, they have lines of symmetry.  Due to the circular assortment of their parts, radially symmetrical animals do not  have distinct front or back ends but they have a central head, that's why they must focus their senses into the head to get information.

Best regards.

it is stable as it is in group 0 which have full outer shells of electrons