Why does convection occur? (1 point)
O Heat flows through the air as electromagnetic radiation, transferring energy without matter.
Heat increases the kinetic energy of molecules; the molecules have greater energy when they collide,
increasing energy transfer.
O Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy.
O
O
Heat is released during some types of reactions and absorbed during others, transferring energy to the
system or surroundings.