The correct answer is A. Hydrology.
Explanation
Based on Lin's goal of modeling her county that specializes in interactions between people and rivers, streams, and ponds, she should use the type of geography that specializes in freshwater bodies such as rivers, streams, and ponds. so the best option would be hydrology because this science is the one that studies the relationship between humans and bodies of water on earth. Therefore, the correct answer is A. hydrology.
