Which biome is dry, cold, and has frozen soil?
a. coniferous forest
b. ocean
c. desert
d. tundra

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

thats not even an aswer choice

answer; (b) clear with a slight blue tint;