premise: an animal can sense things in the direction that their specialized body parts for sensing are facing sent2: being able to sense things from all directions improves something's senses sent3: an animal needs to eat food for nutrients sent4: sensing food has a positive impact on finding food sent5: sensing is performed by specialized body parts sent6: avoiding predators has a positive impact on an organism 's survival sent7: avoiding something requires sensing that something sent8: radial symmetry means an animal has similar body parts dispersed in all directions around a central axis.
hypothesis: radial symmetry has a positive impact on an animal's survival by allowing it to sense predators / food from all directions