The president cannot make laws. Only the legislative branch (the Congress) can make laws. But the president can certainly veto laws and make official appointments. And as commander-in-chief of the military, the president also oversees the armed forces. So the only power in your list that the president does NOT have is to make laws.
Answer:The widespread use of machine guns and rapid-firing artillery pieces on the Western Front meant that any exposed soldier was vulnerable. Protection from enemy fire could only be achieved by digging into the earth. Assaults were carried out across "No Man's Land" between the opposing trenches.
I believe it is building igloos