Plains<span> occur as lowlands along the bottoms of </span>valleys<span> or on the doorsteps of mountains, as coastal </span>plains<span>, and as plateaus or uplands. In a </span>valley<span>, a </span>plain<span> is enclosed on two sides but in other cases a </span>plain<span> may be delineated by a complete or partial ring of hills, by mountains or cliffs.</span>
Under the leadership of Mikhail Gorbachev, the doctrine of Perestroika called for more local control and free-market practices. The correct option among all the options that are given in the question is the second option or option "B". I hope that this answer has come to your help.
Answer: I believe the answer is pressure
Explanation: