Why did the ability to walk upright and the development of the opposable thumb represent important breakthroughs for early hominids?

Which of the following is not a requirement to become a us representative (congressman/congresswoman)?

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another? focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery? question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.

During world war ii, which battle was the first significant us victory in the pacific?