When a new viral infection appears in a population, scientists usually try to develop a vaccine against the virus. which substances would most likely be contained in the new vaccine? a. live bacteria that ingest viruses b. white blood cells from an infected individual c. weakened viruses associated with the infection d. a variety of microbes that will attack the virus

weakened viruses associated with the infection

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

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: