Climate-smart agriculture (CSA) is a holistic approach to addressing the challenges posed by climate change on food security, rural development, and agricultural sustainability. CSA integrates practices and technologies that enhance productivity, build resilience, and reduce greenhouse gas emissions, while ensuring the long-term sustainability of agri-food systems. Its relevance to food security lies in its ability to increase crop yields, improve the resilience of farming systems to climate-induced disruptions, and promote environmentally sustainable practices, thereby securing food supply for growing populations. Additionally, CSA practices, such as agroforestry, water management, and climate-resilient crop varieties, are crucial for adapting agricultural systems to changing environmental conditions. Rural development plays a complementary role by improving infrastructure, access to markets, and the socioeconomic conditions of rural communities, making them more resilient to food insecurity. Extension workers are pivotal in facilitating the adoption of CSA practices at the grassroots level. By disseminating knowledge, promoting sustainable farming techniques, and providing farmers with practical solutions, extension workers act as change agents in improving agricultural productivity and rural livelihoods. This interconnected approach, combining CSA, rural development, and extension services, offers a pathway to achieve sustainable food security in the face of climate change and economic challenges.