Hallie takes notes in class as shown below.

Developed through making observations
About the natural world
Observation → question → hypothesis → experiment

Which would be the best title for her notes?

Scientific Knowledge
Experimentation
Characteristics of Science
Limitations of Science

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a