Why do earthquakes generally take place at plate boundaries?

What are the result of when individual components in an organism interact with others to create noval stucture and function called

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale