Answer:
Option (1) and (3)
Explanation:
Transitional fossils are usually defined as those fossils which show the characteristics of both the earlier existed organism as well as the geologically younger organism.
These are the key evidence of evolution, which describes the morphological changes that occur in an organism by undergoing the process of natural selection, over a long period of time. Some of the examples of transitional fossils are Tiktaalik, Australopithecus afarensis, and Archaeopteryx.
More transitional fossils are those which show the quick evolution pattern of an organism and it is hardly found. It is because evolution is a very slow and time taking process.
Thus, the correct answers are options (1) and (3).
