The correct answers are "Warm and moist climate, moist soil, and seasonal flooding."
The Ecology of early River Valley civilizations included warm and moist climate, Moist Soil, and Seasonal Flooding
The Harappan Civilization, also known as the Indus Valley Civilization, is considered to be one of the oldest civilizations in human history. Settled next to the Indus River approximately in 3300 BCE, extended throughout the territories of what today is Pakistan, the North of India, and Afghanistan. The flooding of the river produced fertile soil, which allowed the Harappans to grow good crops. Irrigation and proper weather allowed the production of crops.