Why do cells divide even after an organism reaches adulthood?

The answer is most definitely the second option or "B". This is because, how you think you grow fingernails, or skin over a wound.

The answer is 2nd option ,full grown organisms need to replace aging and damaged cells

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

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