Which three of the following relationships are examples of mutualism? (Choose the three correct answers)
А
an insect that lives and feeds on the
body of an alligator causing it harm
B
an ant that lives on a plant and
defends the plant from other insects
С
a bird that migrates to follow the
movements of the butterflies that it
eats
D
a lion that hunts and preys on zebras
and antelopes
E
a bird that lands on rhinos or zebras
and eats ticks that live on their skin
F
a type of bacteria that lives in human
intestines and help to digest the food
that humans cannot digest