Answer:
3. Geography Affects Human Behavior
Step-by-step explanation:
All the four options of the question can be explained by the fact that geography affects human behaviour.
The fact that the Filipinio diet is based on seafood is easily explained by the geography of that country: it is an archipelago sorrounded by the ocean.
If Africans build a dam in a river, this is because the geography of the river allows them exploit it for electricity production.
If the majority of Russians live west of the Ural Mountains, it is because this is the area of Russia with the most favorable climate.
Finally, the high population density in the Ganges River Valley is because the valley is flat and very fertile, allowing it to sustain a large quantity of population.