Which statement best describes ecological succession

answer: if she breaths she a thho

explanation:

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

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

a = executive branch; b = judicial branch