Mark the correct statements.

a) In pollination, the pollen of one flower travels to another flower.
b) Insects can acts as pollinators.

c) When the pollen grain is fused with the pistil's egg cell, the process is called pollination.
d) When the pollen grain is fused with the pistil's egg cell, the process is called fertilization.

e) Birches are common park trees.
f) The elm tree produces acorns.