4. Which of the following is true regarding genetic mutations? a. All mutations are harmful.
b. All mutations are beneficial to the organism.
c. Mutations can be harmful, beneficial, or have no effect on the organism.

C

Explanation:

mutations can be harmful, helpful, or neutral depending on the environment

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

answer;

-chlorine

explanation;

-toxic industrial chemicals are industrial chemicals that are manufactured, stored, transported, and used throughout the world. toxic industrial chemicals can be in the gas, liquid, or solid state.

-they can be chemical hazards (e.g., carcinogens, reproductive hazards, corrosives, or agents that affect the lungs or blood) or physical hazards (e.g., flammable, combustible, explosive, or reactive).