My rear wheel axle has broken this is second time Hi! my bike is Trek Marlin 4. I don't know why my axle broke so easy and this happened second time.

its almost winter in my nation we don't have good bicycle shops. They will be close so soon. I can't order a new one what should I do and I want to know why this happened ? Please help me

Is it possible to weld?

I bought my bike about 4 months ago.
Simple answer is that the axle broke because it was overloaded. 

Notice how the drive side bearing is a few centimeters inboard from the end of the axle. That creates a weakness on that side. This was a well known problem with freewheel (as opposed to freehub/cassette) hub designs with more than 6 or 7 sprockets.

Are you a heavy person? Are you carrying a heavy load on the bike? Are you hitting sharp bumps and edges hard? The bike may just not be robust enough for how you are using it.

Better riding technique - standing up and absorbing bumps through you legs, or avoiding them completely - may help you avoid damage to the bike in the future.