Answer:
1. House and Senate
2. Three - Fourths
4. Two - Thirds
Explanation:
According to Article V of the United States Constitution, Ratifying an amendment takes place at the HOUSE and SENATE level and requires that legislatures in THRE - FOURTHS of the states ratify or that each state has a ratification convention where TWO - THIRDS of the conventions approve.
However, during the Convention, various amendments can be proposed if essential.