I think the correct answers from the choices listed above are overgrazing and control river currents, respectively.
<span>Desertification in the region is due to large petroleum deposits.
</span><span> The intertropical convergence zone control river currents.
Hope this answers the question. Have a nice day. </span>
Soil does not exist on these two planets simply because not all materials that compose it exist there, such as water and the presence of organic materials. Water is one of the materials, along with presence of air and rocks in order for soil to be created.
From the following options presented in the problem, the only global city in the region of Russia and its neighboring countries would be A. Moscow.
Of the options presented, between Moscow, Kiev, St. Petersburg, and Tashkent, the only global city would be Moscow. Kiev and Tashkent aren't located in Russia. This leaves Moscow and St. Petersburg. Although some would argue that St. Petersburg would be the answer, it is a fact that St. Petersburg is yet to be called as a global city. Moscow, on the other hand, is already declared one though its activities as one is limited. Both are solely affected as to Russia's approach in the overall development of the country and is yet to show progress.