Answer:
atomic number or atomic mass
It would affect many... A population of fish that lives downstream, migratory herds that drink from the waters, a population of people that live downstream. Why? The fish wont get any water. The animals wont get any water and the people wont get any water. It would affect the people the lease, if you think about it in a major scale.
A field biologist who studies the behavior of birds in a rainforest most likely collects data through observation.
Rainforests are the areas with rich diversity of plants as well as animal species. The trees of rainforests are so long, broad and thick that they completely cover the canopy. They are also recognized by highest rainfalls. Rainforests are considered to be the oldest in the in the Earth's ecosystems.
Observation is the act of carefully watching any action or scenario in order to gain information. Observation can be turned into a formal activity when any data is collected through it for educational or experimental purposes.
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