I think both options are true!
<u>Answer:</u>
<em>Demography: the investigation of the attributes of human populaces. </em>
<u>Explanation</u>:
<em>Demography: the investigation of the attributes of human populaces. </em><em>Age</em><em>,</em> race, sex, different models incorporate where individuals live, where individuals are going,<em> where individuals are conceived, where individuals pass on. </em>
Check is a flat out number of a populace or statistic occasion <em>happening in a predefined time and spot</em>. - essential enrollment frameworks, authoritative records, a few nations don't have these records, <em>so you should locate an alternate method to get information for example a yearly study.</em>
A planetary nebula is a (ring-shaped) type of nebula formed by an expanding shell of gas around an aging star. *a planetary nebula is a type of nebula*. im not completely certain though. i might be wrong.
<span>An extended period of well below average rainfall known as a drought.
If this keep happening, a drought will eventually cause massive shortages in water supply.
Massive shortages in water supply will eventually cause in a decrease of population of various plants and animals</span>
100 years. Thus, (C) is the correct option.