They allow magma to burst between cracks, and they cause blocks of rock to seperate and form new plates.
Answer: Experts who study a country's development measure the economic health, social, and living conditions in order to determine the indicators that show the level of development in a country.
Explanation: These "experts" are more known as economic scientists (or another closely related word), where they take the role of documenting and managing the status of the economy (as their name states).
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The African countries can easily be described and generalized, in the sense of the whole continent, as the economies are predominantly dependent on one or two products.
That dependence on one or two products is making very big problems, and it is also a very big mistake of the governments. When there's a slight variation in the prices on the certain product, the economies are heavily influenced, often in a bed manner.
It is weird though that the African countries have orientated their economies in this way, especially because the continent is very rich in lots of natural resources.
Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
Answer:
it will option B , hope it helps
