During an investigation on natural selection, a student selects a feeding tool that best models the beak of a bird that sips nectar from flowers. Which feeding tool did the student most likely select (a) amount of food
(b) number of bird feeders
(c) invasive bird populations
(d) native birds at backyard birdfeeders

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.

just here for the other one bc they put up with u

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.