It turns it into a present -tense participle. Ex.) Ned is sitting on the chair.
I agree with lack of physical activity and a unhealthy diet with lack of physical activity this could lead to heart disease and much more health risks.
When they're quoting someone, or using information from a specific place.
Answer:
weathering and erosion caused by rivers
Explanation:
I don't know if this is right but after a lot of research this seems more likely..
