sensing is performed by specialized body parts & radial symmetry means an animal has similar body parts dispersed in all directions around a central axis ->  an animal with radial symmetry has specialized body parts for sensing dispersed in all directions around a central axis  an animal with radial symmetry has specialized body parts for sensing dispersed in all directions around a central axis & an animal can sense things in the direction that their specialized body parts for sensing are facing ->  an animal with radial symmetry can sense predators / food from all directions  avoiding predators has a positive impact on an organism 's survival & avoiding something requires sensing that something ->  sensing predators has a positive impact on an animal's survival  an animal needs to eat food for nutrients & sensing food has a positive impact on finding food ->  sensing food has a positive impact on an animal's survival  sensing predators has a positive impact on an animal's survival & sensing food has a positive impact on an animal's survival ->  better senses have a positive impact on an animal 's survival  better senses have a positive impact on an animal 's survival & being able to sense things from all directions improves something's senses ->  being able to sense things from all directions has a positive impact on an animal's survival  an animal with radial symmetry can sense predators / food from all directions & being able to sense things from all directions has a positive impact on an animal's survival -> radial symmetry has a positive impact on an animal's survival by allowing it to sense predators / food from all directions