The correct answer to number one is D) Those rights are natural and absolute.
Unalienable rights essentially mean that they are rights that are granted to people automatically and can never be taken away be a government or other institution.
The correct answer to number two is A) Congress can override a presidential veto by a two-third vote in each house.
The system of checks and balances refers to the idea that the three different parts of the federal government have the ability to ensure that one branch does not get too powerful. The aforementioned answer choice is a perfect example of this, as it ensures that the Presidents ability to veto (reject) laws is limited.
The correct answer to number three is D) imposing taxes on imports.
This is a power delegated to the federal government. More specifically, Congress has this ability.
The correct answer to number four is D) The Supreme Court judges the constitutionality of a law.
This idea that the Supreme Court decides what is constitutional and unconstitutional is known as judicial review. This power ensures that the Supreme Court has the ultimate authority to determine what the US Constitution means.