Why is war against terrorists difficult to fight? a. they have more advanced weaponry. b. they seek to create peace in the world and will not fight back. c. members of terrorist groups are scattered throughout the world, so there is no one clear target. d. they leave no trace of their plans.

Ateam of scientists studied the sediment at the bottom of an ancient lake. they were able to determine the weather conditions of the indus valley in ancient times. they found that the entire area had suffered a drought after the monsoons declined. this drought lasted 200 years. because of the drought, there wasn’t enough food or water. the people of the indus valley were forced to leave their cities.

Look at this photograph taken during the battle of guadalcanal

What are new social classes emerged due to advancement in agriculture ?