How do plants increase the viability of life on earth?

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Why is the indus river so important to the people of pakistan?

If the basis of an isosceles trapezoid have lengths of 11 and 26, what is the length of the median?