<span>Mercury has 0.0553 earth's mass and has no natural satellite. It
is the planet closest to the sun and also the smallest, its surface is
rocky and solid like the earth, has a diameter of 4879 km and is formed
mainly of metal elements. <span>Its orbit around the sun is 88 days and its temperatures are extremely high due to its proximity to the sun.
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I hope my answer can help you.
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The correct answer is - industry.
The developing countries are most often occupied with making the economies heavily focused on the industry, so the countries engage into a big industrialization process.
The industries are usually based around manufacturing of the natural resources that the country has, and most often those are the metal ores, the agricultural products, creating materials...
The developing countries usually have a relatively big economic growth, and that is due to the bad economic basis that they had as a starting point.
