It would be D because it describes the age of the sea floor
I don't know the process... but I do know something else. When mosquitoes bite they actually spit some of there spit in your arm. Also only female mosquitoes bite. That all I know.... sorry! Hopefully I helped a little!!
A two-column proof contains a table with a logical series
of statements and reasons that reach a conclusion. It is commonly present
in geometry. Two column proofs always have two columns: statements and reasons.
The other choices don’t fit in the definition of two column proof.