The ways that population growth has affected the region include: decreased forested areas decreased urbanization increased biodiversity increased groundwater extraction

I believe your answer is decreased forested areas and increased groundwater extraction 
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Decreased forested areas, and increased groundwater extraction. Population growth increases urbanisation and decreases biodiversity, so those are eliminated; higher need for housing causes deforestation, and more water consumption means more groundwater is extracted.

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )

Ibelieve this is true m8