Seed viability refers to the ability of a seed to germinate and develop into a healthy plant. This characteristic is influenced by various factors, including the seed's age, storage conditions, and the species it comes from. Viable seeds have the potential to sprout under suitable environmental conditions, such as moisture, temperature, and light. Testing seed viability is essential for farmers and gardeners to ensure successful planting. Common methods include the germination test, where seeds are placed in a moist environment to observe sprouting, and the tetrazolium test, which assesses seed health by staining living tissues.