Examlex
In the following equations,fill in the missing species.
(a)___ + 7Li
(b)9Li ___ +
Demography
The scientific study of population.
Subsistence
refers to the means by which individuals or societies fulfill their basic needs for survival, such as food, shelter, and clothing, often through direct methods like farming, hunting, or gathering.
Natural Resources
Materials or substances that occur in nature and can be used for economic gain, such as minerals, forests, water, and fertile land.
Birthrate
The number of live births per 1,000 people in a population over a specified period, often used as an indicator of demographic trends.
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