Answer:
Investment in Education.
Jeffrey Sachs state that: "Of all of the investments needed to achieve sustainable development, none is more important than a quality education for every child. The time has come to create a Global Fund for Education to ensure that even the world’s poorest children have the chance to receive a quality education at least through secondary school."
Explanation:
Jeffrey Sachs is an economist and academic, best known as one of the world's leading experts on economic development and the fight against poverty.