In answering the question:
ie. "Explain the factors for the creation of a situation of stalemate on the Western Front"
1) You should have your own points prepared regardless of what the sources say - this aspect is "your own knowledge".
Your points might be:
- The weapons of defence>weapons of offence
- The failure of the Schlieffen plan
- The relatively equal economic strength of the 2 sides leading to a protracted war of resources.
- inflexible leadership still in the thrall of "the cult of the offensive".
Having these points, you would likely write about 4 small paragraphs (2/3 lines per paragraph).
2) You read the sources again. Then fit the information in the source into your points. Lets say that Source A is a map showing how the Schlieffen plan was adjusted (ie. weakening of the swing). --> Voila! You know that in your paragraph about the Schlieffen plan, you will incorporate the information found on that map. Lets say source B is a quote from a soldier talking abou the impenetrability of barbed wire --> That fits into the paragraph on defence>offence.
3) You will then go about incorporating the source info.
In your paragraph abut the failure of the Schlieffen plan, you could write:
"The failure of the Schlieffen plan....caused bottlenecks at Leige and Aachen...allowed the allies to mobilise.... did not knock out France as planned, leaving the Germans to fight a two front war... --> this can be seen on Source A where the map indicates the weakening of the swing to strengthen the hinge
In your paragraph about defence>offense
"Weapons such as the machine gun, heavy cannons and artiller, barbed wire...ensured that defensive trench warfare brought the war to a stalemate....--> This is supported by Source B where a soldier recounts first hand the difficulty of penetrating barbed wire.
4) Integrating words you can use:
- this can be seen in Source X
- as evidenced in Source X
- this is supported by the words of persona Y in source X
- as highlighted in Source X
- an example of this is found in Source X
- persona Y in Source X supports this, stating " ____ "