This Graph actually shows 2 different lines of data. how are these two lines of data similar and how are they different

On a floor there are several 1-4 mm elongated drops leading away from a body lying in a pool of blood. the the forward wall there is a sigzag pattern and on the walls to the right side there is a linear patter

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?