What is the different between theory of plate tectonics, continental, drift, and sea- floor spreading?

Have you Googled those three terms?

yes but i still don't understand

all different acts of the same screen play. I do not think you should have a comma between continental and drift :)

The theory of plate tectonics, continental drift, and sea-floor spreading are interconnected concepts that explain the movement and interactions of Earth's lithospheric plates. Understanding each concept will help in understanding their differences.

1. Continental Drift: This concept, proposed by Alfred Wegener in the early 20th century, suggests that Earth's continents were once united in a supercontinent called Pangaea and have since gradually drifted apart. Wegener gathered evidence supporting this idea, including the matching shapes of coastlines, similar rock formations, and the distribution of plant and animal fossils across continents. However, Wegener couldn't explain the mechanism driving continental movement.

2. Sea-Floor Spreading: This concept, developed in the mid-20th century by Harry Hess, explains the mechanism behind continental drift. Sea-floor spreading is the process by which new oceanic crust is formed at mid-ocean ridges and then moves away in both directions, creating a continuous flow of oceanic crust. As the molten material rises from the mantle to form new crust, it pushes the existing crust laterally, causing the ocean floor to spread apart. This movement of the oceanic crust helps explain how continents can move.

3. Theory of Plate Tectonics: The theory of plate tectonics incorporates both continental drift and sea-floor spreading to provide a comprehensive explanation for the movement of Earth's lithospheric plates. It states that Earth's lithosphere (consisting of the crust and uppermost part of the mantle) is broken into several large and several smaller rigid plates that float on a partially molten layer called the asthenosphere. These plates interact at their boundaries, which can be divergent (moving apart, as in sea-floor spreading), convergent (moving toward each other, resulting in collisions or subduction zones), or transform (sliding past one another).

In summary, continental drift refers to the gradual movement of Earth's continents over time, sea-floor spreading describes the process of new oceanic crust formation and lateral movement, and the theory of plate tectonics combines these concepts to explain the interactions and movements of Earth's lithospheric plates.