Due to the stories in the <em>The Horse, The Wheel and Language</em>, scholars know that the Indo-Aryans first lived as hunter-gatherers, although they later survived as mobile herders as well. When the steppes became drier and cooler and the cattle, horses and bronze technology were introduced by influence of Balkan cultures, the Indo-Aryans started to adapt their way of life to become mobile herders.
Your teacher may be looking for something more specific than this. But, now the idea of evolution is generally accepted and now with modern technology we can mostly prove his theory. (it isnt proven as it is a theory).
Answer:
Because of his new position as lieutenant governor
Explanation:
Melvin Thompson fought Herman Talmadge on who should become the governor of Georgia after the then Governor elect died. This was in 1946, I'm Melvin's argument he thought he should be made the governor because he had been elected as the lieutenant governor of Georgia. Herman was made governor but this was only temporary. He was later removed and Melvin became the governor.