Which of the following best describes gravitational force? (2 points)

an attraction between two objects that have mass
an attraction between two objects due to their electrons
the force that keeps atoms and molecules bound together
the force that keeps objects from moving when they are at rest

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.