El efectivo translates into the cash and this is the easier form of payment because you use bills and coins and is faster to pay with this. The other options are not logical to be chosen because la agencia de viajes that means the travel agency, los cheques de viajero that means traveler's checks and el pasajero that means the passenger.
yknow, maybe be a little bit more civilised and use better words to phrase what you want, you are the one asking for help, treat people like how you want to be treated :)
