The two most common economic activities in africa arethe two most common economic activities in africa are
a.

commercial farming and subsistence farming
b.

subsistence farming and nomadic herding.

c.

hunting and gathering and subsistence farming.

d.

copper mining and diamond mining.

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?

Which region was the hearth for the largest number of agricultural animals such as pigs sheep and cows

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed