Please select the word from the list that best fits the definition An echinoderm that is covered with movable spines and that eats seaweed

sea urchin

sea star

brittle star

sea cucumber

echinoderm

According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

What drives an advertising campaign?

What was darwins theory of common decent