This self-study module is part of the series ‘Introduction to Plant Biology’ and introduces abiotic stress in plants and explains how plants cope with and adapt to challenging environmental conditions. It is designed for students learning basic plant biology and for teachers seeking clear figures and explanations for educational use. The module covers key abiotic stresses - heat, cold, flooding, drought, salinity, and high light intensity - and examines the physiological, structural, and adaptive strategies plants use to survive and grow under these conditions.