When a fossil disappears from the fossil record, we know that those organisms went extinct.
Explanation:
The first option is not correct because there simply isn't any proof of alien abductions, nor that they have visited our planet.
The second option is correct because when a fossil that has been present in particular geological layers suddenly is missing, usually means that the organism went extinct at that time or very soon after.
The third option is not correct because the fossils are proof of the existence of the organism.
The fourth option is not correct because one of the options above is correct.
The pressure exerted by the air is said to be the atmospheric pressure and it acts as force over the surface of the earth. As pulls exerted by the gravity of the earth.
Commonly measured by the barometer, a device used to measure that atmosphere when values are measured or taken from the average mean sea levels.
Thus its defined be as force per unit area as air has weight. The development of high and low pressure is measured at the sea level which is 1013 pascal.
Mountains support Wegeners idea by how he saw that the same species on one mountain was the same on a different one thus causing him to believe that the earth is forming or making mountains in some way.
im acully on this qution write know if u look it up someoneelce just asked this quetion thjey have the ansere just read it and ull find it hope this helps mam/sirExplanation:
