According to economic theory, countries dependent on agriculture and allied activities ie primary sector, grow slowly and remain under-developed or developing economies. The export the raw material to the rest of the world. ... So Secondary sector is most important for the growth of and economy.
Think of the mantle like a peanut butter sandwich<span>. You have the two pieces of bread and the </span>peanut butter<span> between them. In the </span>mantle<span>, we have two layers of solid rock with heated flowing rock between them. Next is the outer core. •</span>ω•
Answer:
Sediments are used to provide the proxies to understand the environmental changes as, the sediments are formed by the activity of the weathering from the wind, glacier and the water. The different weathering agent and other transportation agent are different types of the mark over the sediments that help in the study of the past environment.