D) It can only be used in areas with specific kinds of rivers.
The answer is a)
Individual parts within a cell that make the cell look pretty.
Answer:
Some individual insects are more likely than others to survive and reproduce due to their inherited traits
Explanation:
Organisms are able to develop resistance to harsh environmental factors due to inherited traits which enable them to survive and become better adapted to their environment.
Some pests must have overtime acquired resistance to the concentration of the pesticide used in each year and passed on these traits to their offspring. This resistance accounts for the need for the use of a higher concentration of pesticide each year to overcome the resistance acquired by some pests.