Which two of these characteristics does an organism with bilateral symmetry possess?

A. lack of tissue

B. symmetrical in many ways across a central axis

C. presence of a head

D. development from three cell layers

Choices (b) and (c) are the most correct. Bilateral symmetry requires a central axis for there to be two halves. In addition, this type of symmetry requires a head, which will encounter the environment before any other part of the body and move in the direction of travel. Most animals exhibit this characteristic.