Physical geography is a branch of geography that studies the physical features of the Earth and how they change over time. It includes the study of climates and weather, landforms, plant and animal life, and the measurement and classification of the size and shape of the Earth. Human geography studies how people and societies interact with their environments and each other across different regions. Geography also examines how human activities like production, social interaction, politics, and culture are influenced by and shape the physical environment. The objectives of geography include understanding the relationships between natural resources and human development and fostering international understanding and environmental conservation.