Complex sentence: Lesotho's progress in moving from a predominantly subsistence-oriented economy to a lower middle income economy exporting natural resources and manufacturing goods for exports, has brought higher and more secure incomes to a significant portion of the population.
Split into simpler sentences: Lesotho's progress in moving from a predominantly subsistence-oriented economy to a lower middle income economy exporting natural resources and manufacturing goods. The exporting sectors have brought higher and more secure incomes to a significant portion of the population.