The correct answer is letter C
Explanation: Population Explosion the high population growth in the world or a specific territory or region. It can be caused by different reasons, varying according to the historical period and the different locations.
<span>The options were
a. applied research
b. field research
c. basic research
d. both a. and b.
The answer is C. basic research
Basic research is a research done because of our desire to know more, it doesn't necessarily have any consequences but only helps in expanding our knowledge on the aspect on which research is being done. Unlike applied research it cannot be directly applied to real world but only gives the required answers</span>
Hypnagogic happens as a result of sleep deprivation, caffeine intake or stress. It usually happens during a transition between wakefulness and sleep