Instead of riding his bike, a college student drives to class every day. he also drives to the store, to friends' houses, and everywhere else. every time he fills up his tank, a little bit of gasoline drips to the ground. the car's exhaust contains nitrogen oxides, which contribute to nitrogen levels in nearby water bodies. what two types of pollution are demonstrated in this real world example?

group of answer choices

toxic

sediment

nutrient

bacterial

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.