Here you go I hope this helps :))). four main reasons, one being that the Schlieffen plan failed, another reason was that the French were unable to defeat the Germans completely at the Battle of the Marne, another reasons was the "race to the Channel" and the last reason was that defending positions was far easier than attacking
The result of the stalemate that developed in the Western front during WW1was that this Western front remained static, killing many soldiers of either side but not real progress at all. It resulted in so much attrition. Both sides tried to wear the opponent down killing as many soldiers as possible. This resulted in a stalemate in the trenches, no progress to either side. Such as a deadlock that stayed for a long time.
During the pandemic I found it hard to study for me just getting in my own little world with music especially helped me a lot. I make sure to set time aside to work when no one will bother me. I hope those will be helpful to you:).