Answer:
The net migration rate is the difference between the number of immigrants (people coming into an area) and the number of emigrants (people leaving an area) throughout the year. When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs.
formed by chemical action of groundwater
Explanation:
The first column charted by Diana was formed by the chemical action of groundwater on the terrain.
Column 1 Column 2
Sinkholes Hotsprings
Caverns Geysers.
Sinkholes and caverns are products of chemical action of ground water in an area underlain by limestone.
A sinkholes is a prominent feature found in karst topography. It occurs when underlying beds are weathered and dissolved away causing the roof to collapse eventually.
A cavern is chamber or compartments found in a cave body, they a result from an extensive and prolong chemical weathering action.
learn more:
Chemical weathering brainly.com/question/1970623
#learnwithBrainly
Equatorial regions are the regions located on or near the equator. Equatorial regions have hot and wet climate. The Amazon Basin (South America), the Congo Basin (Africa) and some regions of Asia are located in equatorial regions.
We refer to this concept as "sea level". (answer D is the correct one)
Actually, the level of the sea is not constant and it's not the same everywhere, so we are talking here about the average sea level only.
Some places are located below the sea lever (for example some parts of the Netherlands) and they have to take extra measures not to be flooded.