Xara Picasso 1.8 gasoline does not start

The car worked perfectly I left it in the garage and the next day it does not start, the battery works but the car does not want to start it if I wanted to start but does not want, what can it be? I am told that it is possibly the tank gasoline pump but I would like to make sure before disassembling it I do not have a hard and I have to do it.

Someone can there, I would appreciate it,
I don't know where to start
thanks to everyone

The first thing you should do is see the cause for which it does not start, if it is a lack of fuel or spark, it sees which of these two opponents it is not present and then we are guiding you.

Thanks for the Alluda I hope you are right

thanks