Why process for proposing an amendment is easiest and which is the most difficult?

The easiest process for proposing an amendment is through Congress, where a two-thirds majority in both the House and Senate can propose an amendment, reflecting a relatively straightforward legislative procedure. In contrast, the most difficult process involves state legislatures, where an amendment can be proposed through a Constitutional Convention, requiring the agreement of two-thirds of state legislatures, making it a challenging and complex route due to the need for widespread consensus among diverse states.