Which of the following accurately describes immunity ? a) active immunity can develop from vaccinations. b) passive immunity lasts a long time. c) passive immunity can't happen naturally d) active immunity won't develop after an individual fights an infection

The correct answer is (A) Active immunity can develop from vaccination

Active immunity is induced into the body after the exposure of antigen and the antibodies produced in response to the antigen  which lasts for a longer duration of time. Vaccination are given to induce active immunity in the body. Vaccines are the attenuated form of infectious bacteria that is given to generate immune response; antibody production. This attenuated form will not cause infection in the body but will evoke the immune system to produce antibodies. This is an example of Active immunity.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave