Question

why do developing countries usually have less variety in their economic activities?
limited access to education means that people are not trained to work in industry or technology.
focusing on one or two economic activities leads to more rapid economic development.
developing countries are usually small and have limited populations and resources.
people prefer the lifestyle that accompanies traditional activities such as farming.

Explanation:

Limited access to education restricts the skill - set of the workforce in developing countries. Without proper training in industry or technology, there is less capacity to diversify economic activities. Other options have flaws: focusing on a few activities may not always lead to more rapid development in the long - run as it can make the economy vulnerable; not all developing countries are small; and preference for traditional lifestyles is not the main reason for lack of variety in economic activities.

Answer:

Limited access to education means that people are not trained to work in industry or technology.