Early agrarian societies learned how to harness water with the use of oxens and horses. It was the power of muscle that was greatly used centuries ago in order to provide irrigation to water in various farms. This was very effective, but as energy was discovered, this method became obsolete.
Hypothesis: Batting practice will positively affect a player's batting practice because he is working on his mechanics to better his game.
The barbarian invasions destroyed Western Europe. The Roman Empire ruled Western Europe. The decline of the Roman Empire was when it failed to control and rule over its territories. The Roman Empire broke up into smaller territories. The barbarians were then able to invade Western Europe. The rise of Christianity and continual pressure from the barbarians on the Roman Empire's borders were some of the factors that contributed to the break-up of Western Europe. The rule of the Roman Empire was over when Rome fell to the conquering invaders
It decreased and very significantly so!
Most of native Americas died of diseases brought by Europeans; but some were also killed directly by the Europeans. Many also mixed with the Europeans (by marriage or rape...) so there was also a mixed indigenous-white population.
ps. C and D is essentially the same answer
Noah´s dad might be teaching him induction, this would mean that Noah should be able to understand what games can be harmful and which ones are not. This technique might involve the parent talking to his child and helping him to understand what he did wrong that hurt him