Choose the appropriate term for each labeled part of the image.
Label A (ridge core ocean trench)
Label B (ocean trench ridge mantle)
Label C (convection slab pull ridge push)
Label D (convection current slab pull ridge push)

A-b -d d-c c-d

Explanation:

but there is no

i guess you forgot putting it.

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