Abotanist scrapes pollen off a flower

A botanist scrapes pollen off a flower of one plant and then uses it to pollinate the flower of another plant this phenomena is known as artificial pollination.

b

is correct hope this   also i learnd this in middle school

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.