Please help y’all I don’t understand

Non renewable resources like petroleum eventually

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o