Oak is a mighty tree that is a symbol of strength, resilience and durability. It can reach 50 meters in height and have a trunk diameter of up to 2 meters. The oak bark is thick, brown, with deep cracks. Oak leaves are leathery, oval, with a serrated edge. Oak flowers are inconspicuous, greenish-yellow in color. Oak fruits are acorns that ripen in the fall. Oak is a very common tree. It is found in Europe, Asia, North America and Africa. Oak is an unpretentious tree that can grow in different...