Is sharpening a pencil physical or chemical property

Ineed the answer to question 1 , i’m desperate

During cooling, the kinetic energy of the molecules falls. why does this happen? a. the motion of the molecules increases. b. the motion of the molecules slows down. c. the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?