Solution:-

Lamarck projected his plan of evolution on the premise of his studies on the patterns of fossils and matching the organisms to their setting. It states that elements of the body that area unit used extensively, become larger and stronger whereas people who aren’t used, deteriorate. This theory is explained by taking AN example of a ruminant. Chevalier de Lamarck advised that the ruminant evolved from ground-feeding herbivores. however at a later stage, the world fell wanting its ground-level vegetation, and therefore the ruminant took to feeding on trees. The constant stretching of its neck and fore-limbs over several generations resulted in these structures changing into longer and stronger thus on reach higher foliage.