The legislative branch. If two-thirds of both the Senate and the House approve the amendment, and two-thirds of the states approve it, it becomes law regardless of the President's influence.
it has no formal role in the process (apex)
The Legislative Branch is created via article I of the constitution. However, the legislative branch also plays a major role in article V, which concerns amending the constitution.
legislative
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Calcium plays a major role in the formation of bones.
Canada plays a major role. The greatest number of military peacekeepers are Canadian soldiers.
Rubisco
thymus
The President, The Executive Branch of the Government, plays a huge role in the bill process. Once a bill is passed by both The House of Representatives and the Senate, the bill goes to the President's "Desk". He has the choice of either signing off on it (approving it) or vetoing the bill (rejecting it).
The tongue.
It plays a major role in our nervous system.
Phosphate