A person who observes and studies the natural world is called

A Naturalist is a person who observes and studies the natural world, often focusing on plants, animals, and ecosystems. They typically engage in fieldwork, collecting data and making observations to understand biological processes and environmental interactions. This term emphasizes direct observation and study of nature.

• Gastronomist: A person who studies the art and science of good eating and cooking.
• Geologist: A scientist who studies the solid and liquid matter that constitutes the Earth, as well as the processes and history that have shaped it.
• Astrologist: A person who practices astrology, the belief that the positions and movements of celestial bodies influence human affairs and natural events. This is a pseudoscience, distinct from scientific observation of the natural world.