PLS HELP What is the type of fighting that uses knowledge of local terrain called?

a. Monkey Warfare
b. Ambush Warfare
c. Traditional Warfare
d. Guerilla Warfare

In shallow water at the beach, manuel saw an animal whose body was protected by hard plates. its body also had radial symmetry. the animal pumped water into its tube feet to move. which invertebrate group does this animal belong to? a. mollusks b. echinoderms c. sponges d arthropods