What is the best answer for these two questions?

Which of these is an exclusive power of the house of representatives? to amend a bill to impeach a government official to check the power of the president to review a tax bill the senate has proposed

Which event is considered to be start of the "hellenistic era"? a) the founding of the roman empire b) the death of alexander the great c) the end of the peloponnesian wars d) the founding of the roman republic

How did its location near the sea most contribute to the growth of ancient greece? a.by supplying water for irrigating crops b.by providing easy access to trade routes c.by creating a natural barrier from enemies d.by generating power for watermills