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.
Earth has the most density with 5.51 grams / cm^3
Answer:
Rift valleys are Formed from either from the action of tensional forces in the crust or from the action of compressional forces!
And they move due to the force of gravity!
The block mountain (horst) is left standing higher above the sunken graben!