I choose a Temperate Forest in Eastern USA (Tennessee/North Carolina)
4 Biotic factors in a Forest
Plants such as trees and shrubs
Animals such as moose
Insects such as ants and mosquitoes
Fungi such as mushrooms
4 Abiotic factors in a Forest
Sun proving sunlight to all the plants
Rocks creating a rough terrain
Water flowing in rivers to provide plants and animals with essential electrolytes and minerals
Rich Soil providing essential nutrients for plant growth, which in turn provide a food source for herbivorous animals such as moose.
One interaction I see between biotic and abiotic factors is that the water flowing in rivers and streams inside my Temperate Forest is providing essential electrolytes and minerals such as Magnesium and Calcium to animals such as moose and deer drinking the water, or plants nearby the stream, who utilize the water in their process of cellular respiration to create glucose which feeds the rest of the plant and in turn will feed an herbivorous animals looking for fresh plants to eat.