1. Central America and the Caribbean economies contain which two main elements in their economy to help people meet their basic needs? O Agriculture and tourism Agriculture and industry Tourism and industry Trade and industry C

81 is a composite number.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.