Which geographic factors influenced the location of Russia's first civilization in what is today Ukraine?

sheltered harbors and short winters

deep valleys and reliable rainfall

rich soil and fairly mild climate

The correct answer is rich soil and fairly mild climate

The soil was great for the early Russian society because they didn't yet have the technology to move further north where they are now. The climate was good for growing crops and the soil was rich which made it possible for agriculture to develop and for people to settle in the area.