The principle of "separation of powers" is improved with a bicameral legislature rather than a unicameral legislature because a bicameral legislature:
creates a legislature that has less power than the judicial branch.
needs fewer representatives to pass the same number of laws.
takes more of the power from the executive branch.
requires that two bodies of government pass laws.

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; disconfirm the catharsis theory;

answer; shays rebellion;