The main way constitutional amendments are proposed is by

The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures.

Explanation:

A vote of two thirds of both chamber of congress I think

Explanation:

where are the statements?

answer; i believe that the correct answer is (c) arctic tundra;