Lamarck gave which example to explain Lamarckism?

The correct answer is: All of the above

• Lamarck proposed his theory of evolution in 1809 and was well accepted in the 19th century.
• He explains the evolution by using various examples of giraffes, the webbed feet of a duck, and flightless birds.
• He explains that the giraffe had an ancestor who has a short neck and leg like horses, but due to the scarcity of food and their short neck they were unable to reach leaves at the height and die because of hunger. So, they evolve themselves with long necks and legs to reach the leaves of the tall trees.