Answer and Explanation:
Observing population directly gives you accurate result .
Direct observation does not need any intermediary as they themselves go for survey.
So, it is cost efficient.
Whereas indirect observing may involve manipulations.
It requires someone or many to hire who helps in surveying.
It incurs cost.
Thus, direct observation is always better than indirect observation.
When it nears the sun, due to the power of solar wind
According to science, D would be the correct answer. Hope this helps!
Zit sure has to be B. Pollution
