Please just answer the box’s that are circled, thank you!

Name the type of chemical that speeds up digestion

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping