Reflection and absorption by the atmosphere prevent some from reaching earth's surface. a. ozone c. nitrogen b. radiation d. oxygen

b. radiation

Reflection and absorption by the atmosphere prevent some radiation from reaching the Earth's surface. These radiations comes from the sun. The solar radiations are hot and most of these radiations are absorbed by the gases present in the earth's atmosphere and reflected back to the space. In this way atmosphere plays an important role in keeping the planet cool.

the answer would be 3

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds