Answer:
2.
Explanation:
only 2 of them are the causes of air pollution
The correct answer is: b) directional selection
Directional selection is a type of natural selection in which an extreme phenotype is favored over other phenotypes. In this case, phenotype of large crickets will be favored, because they cannot be eaten by lizards. Large crickets are advantageous in surviving and reproduction. This will cause the allele frequency to shift over time in the direction of that large size phenotype.
B:Worm
Fern and Banana aren’t decomposers the wolf is a consumer
They migrate though the North Atlantic Ocean. And also they migrate from North America,Europe,Iceland,and northwestern Russia.
