Since you don't provide picture, find the spot that is located on the west part of the Mali, On top of the River Niger and below the Sahara desert
Answer:
A hydrometer is a instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces it's own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water
<span>it support less biodiversity </span>
A topographic map uses contour lines to show elevation
The Chinese Russian border or the Sino Russian border is the international border between China and Russia