Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Participants_in_Events ( Event_ID VARCHAR )

### Question ###
What is the id of the event with the most participants?

### Accurate SQL ###

SELECT Event_ID FROM Participants_in_Events GROUP BY Event_ID ORDER BY COUNT(*) DESC LIMIT 1