Why we cannot see an atom with a naked eye?

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

The clouds are grey and ground is wet. a quantitative b qualitative

Why did southern business leaders want to increase the number of slaves