A: In chromosomes of cells
Smooth, rounded characteristics such as large eyes, fat cheeks, and a large head (i.e. babies) is very appealing to humans and other species (the way we call it "cuteness") which is a stimuli that promotes caring of babies and young children. This is also the same principle why humans find puppies, kittens, and other baby animals cute and want to care for them.
Umm... I believe you haven't shown the answers? But anyways, a carrying capacity is the maximum amount of organisms that can live within an environment. Once they reach carrying capacity, they typically begin to die off because there isn't enough food to provide to everyone.
A target cell respond to a hormone because it bears receptors