the poorer the country, the larger the percentage of labour force engaged in?

The statement suggests that in poorer countries, a larger percentage of the labor force is engaged in agriculture. This is because agriculture is often the main source of livelihood for people in low-income countries. Agriculture provides food and raw materials, as well as employment opportunities for a significant portion of the population. In many cases, the lack of economic development and infrastructure in poorer countries also limits opportunities for other types of employment, such as manufacturing or trading. As countries develop economically and become more industrialized, there is typically a shift away from agriculture and towards other industries such as manufacturing and services. Therefore, the statement implies that the level of economic development is closely related to the type of employment opportunities available to the labor force.