Why do graff and anderson questions ender seven days after his first battle?

Graff and Anderson meet with Ender seven days before the battle because they want to decide if he is really ready to accelerate the attack and participate in a real confrontation. Both play opposite roles so that Ender can understand two different points of view, on the one hand the need to lead everyone and make unquestionable decisions and on the other the not to stop listening to their team and stay in tune with them.

the use of electrical signals that transit messages is know as

answer; mission;