Concept:A settlement site must offer conditions that support human survival, shelter, and economic activities.
Explanation:Adequate water supply is necessary for drinking, farming, and daily use.
Land for building provides space for homes, roads, and public facilities.
Defence protects inhabitants from attacks and natural threats.
Fertile soil encourages agriculture and food production.
Infertile soil limits farming and cannot support a settlement.
Thus, infertility of soil is not a favourable condition for siting a settlement.
Answer:D. Infertility of soil