Is this a complete sentence?
Are dry after such a severe drought.

no

Explanation:

you have a verb, and you have a predicate, but you don't have a subject, what is the "are dry" connecting the "after such a severe drought" connecting:

are dry after such a severe drought.

a

explanation:

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.