If a mouse eats grass, a snake eats the mouse, and an eagle eats the snake, what is the eagle ?
a. producer.
b. secondary consumer.
c. primary consumer.
d. tertiary consumer.

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.