Trees are man's source of food.

While trees do provide some food for humans, such as fruits and nuts, they are not the primary source of food for most people. The majority of our food comes from agriculture, including crops grown in fields and livestock raised on farms. Trees do play an important role in providing oxygen, shade, and habitat for wildlife, but they are not the main source of food for humans.

Trees are not the sole source of food for humans. While trees provide fruits, nuts, and other edible plant materials, humans rely on a wide range of sources for their sustenance, including grains, vegetables, proteins, and dairy products.