After a bill is sent to the president, the step that can happen is:
The president can veto the bill.
The other options listed—sending it to committee, asking the House to debate it, or sending it to the other house—do not occur as those steps take place prior to the bill reaching the president. Once the bill is on the president's desk, they can either sign it into law, veto it, or take no action, which may result in the bill becoming law after a certain period if Congress is in session.