Answer:
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It is A, 3.2 million year old bones. Until now, the oldest fossil skeleton of a human ancestor was the 3.2-million-year-old partial skeleton of Lucy, discovered in the Afar depression of Ethiopia, near Hadar, in 1974 and named Au. afarensis.
The Rate of movement of the Pacific Plate will be 37.87cm per year.
Underneath the Pacific Ocean is an oceanic tectonic plate known as the Pacific Plate. It is the largest tectonic plate at 103 million km2. The Farallon, Phoenix, and Izanagi Plate triple junction are where the plate initially formed 190 million years ago.
From the information given, the following can be deduced:
Distance = 500 km = 50000000cm
Time = 1.32 million years = 1320000 years.
Therefore, the rate of plate movement will be (i.e. speed) :
(speed) = Distance / Time
(speed) = 50000000 / 1320000.
(speed) = 37.87 cm/yr
To know more about Pacific Plate refer to: brainly.com/question/5794493
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