Explore the fundamental concepts of one-dimensional objects in algebraic topology through this introductory lecture. Delve into the diverse representations of lines and circles, laying the groundwork for understanding more complex topological structures. Learn about parametrization, moduli spaces, and knots as you begin your journey into this fascinating branch of mathematics. Gain insights from Professor N J Wildberger's expert instruction at UNSW, setting the stage for further exploration of algebraic topology concepts.