A solitary match of goldfish in an aquarium created an extensive number of posterity. These posterity indicated varieties fit as a fiddle and shading. The in all likelihood clarification for these varieties is that the posterity was delivered from various mixes of qualities.
That region experienced a surplus of food. - the best answer. Nile Valley was located near river Nile in Egypt. It was a flood plain defined like a heaven for farmers. There were perfect conditions for people to grow food and obtain water. The river was flooding created conditions to live like that..
• Economic motive
• Political motives
• Religious motives
• Exploration motives