How many founding fathers were there?

Compare the quantity in column a with the quantity in column b. pa p a is tangent to the circle at a. column a column b ap a p ax a x question 4 options: the two quantities are equal. the quantity in column a is greater. the relationship cannot be determined from the information given. the quantity in column b is greater.

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?

Who developed the theory of plate tectonics?