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

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Match the people with the appropriate description. vernon and irene castle arthur murray fred astaire willi ninja a. stylized the forms of ballroom dance by incorporating other dance forms b. responsible for renewing the influence of ballroom dance in america c. godfather of vogue danced. responsible for standardization/teaching of steps leading to spread of ballroom dance education

Put the expeditions of exploration into their correct chronological order