What geographic feature did/does al-Qaeda use in Afghanistan for training, planning, and storing weapons for terrorist attacks?
forests
mountains
jungles
O desert
rivers
Savanna

Mountains.

Explanation:

Although much of the territory of Afghanistan is desert, most of it (75%) is mountainous. In this context, the terrorist network Al Qaeda used this nation as its main base, using the mountainous regions of the country, especially on its border with Pakistan, as the center of its operations.

The choice of this place for this purpose was due to the inability of the tank and artillery forces of the regular armies to move through mountainous regions, which favors guerrilla warfare tactics and sporadic attacks, which are the tactics that mostly these terrorist groups dominate.

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.