This document provides an overview of key concepts related to livelihoods and food security. It discusses definitions of food security, including its four main dimensions: availability, access, stability, and utilization. Livelihoods are defined as the capabilities, assets, and activities required for a means of living. The sustainable livelihoods approach views livelihoods as comprising various assets that households use to undertake activities to ensure livelihood security and meet basic needs like food. The document outlines common livelihood activities and assets, and explains how livelihoods and food security are interconnected, with livelihood activities and outcomes determining a household's food security.