Option 1: Stalactites and stalagmites are deposits of lime found in caves.

This statement is correct. Stalactites and stalagmites are indeed formed in caves due to the deposition of calcium carbonate from dripping water. Stalactites hang from the ceiling, while stalagmites rise from the cave floor.

Option 2: The sea-floor is older than the land.

This statement is incorrect. The continental crust, which makes up the land, is generally older than the oceanic crust, which makes up the sea-floor. The oceanic crust is continually being formed at mid-ocean ridges and recycled through processes like subduction, making it much younger than the continental crust.

Option 3: The first rocks were formed as a result of the cooling of molten matter.

This statement is correct. The first rocks on Earth formed through the cooling and solidification of molten material, such as lava or magma. These igneous rocks were the building blocks for the formation of other types of rocks through various geological processes.

Option 4: Sedimentary rocks are also called aqueous rocks because they were formed by the agency of water.

This statement is correct. Sedimentary rocks are indeed formed by the deposition and compaction of sediments,