what observations led to wegners hypothesis

What observation led to Wegner’s hypothesis of continental drift
His first observation was that the shorelines of the continents looked like if they were connected once like a jigsaw puzzle.
What types of evidence support Wegner’s Hypothesis
Same species of animals on different types of continents, climate clues, and rock similarity between Mountain ranges.
Describe the process of seafloor spreading.
That the valley at the center of the ridge was actually a break, or rift, in the earth crust and that molten rock, or magma, from deep inside the earth was welling up through the rift, the ocean floor was moving away from both sides of the ridge, as the ocean floor moved away from the ridge, it was replaced by rising magma that cooled and solidified ...