The Tectonic Forces is responsible in that creation
It's the convection currents that happen in the asthenosphere part of the Earth Crust , causing the African Plates to Diverge and continuously produce Rifts that will eventually formed a rift valley
This process can take millions of years
The (key)substrate fits into the active site of the (lock)enzyme.
Answer: B. Authorized Congress to implement a graduate income tax
Explanation: The Sixteenth Amendment (Amendment XVI) to the United States Constitution allows Congress to impose an income tax from any source without alotting it among the states on the basis of population.
Answer:
The correct answer is b. social phenomena.
Explanation:
A social phenomenon is a fact that makes man responsible for the events of community life and his own social situation, lucidly manifesting himself against the elements that condition, subdue and exploit him, in such a way that they lead him inescapably towards a transformation of its own. They are actions that come from the influence of one or more people on another person, they cover all types of interpersonal behavior (physical or oral) and the moments where two or more individuals act. These phenomena are observable and practical in the social life of being human, they also constitute the basic information for sociology; They are all the procedures that occur within a society, which can be carried out by some of its members or by its entirety.