Alfred Wegener noticed that the continents of Africa and South America looked like they might fit together. There was also evidence that similar animal fossils appeared on both continents. Wegner proposed a theory called continental drift, stating that it appeared the continents had drifted apart, but he could not explain how.Many did not believe Wegner because it seemed Implousible that Earth's continents were moving. What became of the theory of continental drift? Scientists eventually found the mechanism to explain it,and it led to the theory of Plate Tectonics. It was disproven by other scientists. Wegner was ridiculed for the Incomplete theory, so he withdrew it from the scientific community. It was discarded as nonsense since Wegner could not explain how it worked.

## Step 1
The problem presents a historical context about Alfred Wegener's theory of continental drift. This theory proposed that the continents were once joined together and have since drifted apart. However, Wegener was unable to provide a convincing mechanism to explain this movement, which led to skepticism and disbelief among other scientists.

## Step 2
The question asks what happened to Wegener's theory of continental drift. The options provided are:
1. Scientists eventually found the mechanism to explain it, and it led to the theory of Plate Tectonics.
2. It was disproven by other scientists.
3. Wegner was ridiculed for the Incomplete theory, so he withdrew it from the scientific community.
4. It was discarded as nonsense since Wegner could not explain how it worked.

## Step 3
The correct answer is the first option. Over time, scientists discovered the mechanism that Wegener's theory lacked, which is the movement of tectonic plates. This discovery led to the development of the theory of Plate Tectonics, which is a more comprehensive explanation of the movement of continents. The other options are incorrect because they either oversimplify the situation or misrepresent the historical progression of scientific theories.