Why were the fossil remains of mesosaurus important to alfred wegener?
they proved that earth is composed of several rocky tectonic plates.
they proved that mesosaurus is extinct.
they were the first fossils discovered in africa and south america.
they suggested that the two continents where they were found could have been joined.

Option (4)

Explanation:

The 'Mesosaurus' were the reptile-like organisms that existed during the early Permian age. The fossils of this organisms were collected from the southern continents such as South Africa and South America, where the two continents were separated due to the formation of the Atlantic ocean.

This fossils were observed by Alfred Wegener and suggested that this was one of the evidence of the continental drift theory, where he thought that these two continents were earlier attached together in its geological past. With the gradual increase in time, these two continents got separated.

Hence, the most appropriate answer is option (4).

what's the question?

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).