Starch is a type of carbohydrate. Carbohydrates can come in 3 types: sugar, starch and fibre. Carbohydrates can be considered as simple or complex depending on how quickly they are broken down into glucose. This link from the British Dietetic Association may be useful to learn more: https://www.bda.uk.com/resource/carbohydrates.html. You can also review your materials within your resources and lessons sections.