Answer :
Answer: Bilateral symmetry.
Explanation: Bilateral symmetry is known as two sided symmetry. It is the most common type of symmetry that can be seen in the organism throughout the biological world.
Animals that poses bilateral symmetry is due to the cephalizastion which is an evolutionary trend.
The animals that posses this symmetry have dorsal, ventral, anterior end.
Example: spider, insects, flatworms, earthworm.