<span>An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem. For example, plants or lichens sensitive to heavy metals or acids in precipitation may be indicators of air pollution. Indicator species can also reflect a unique set of environmental qualities or characteristics found in a specific place, such as a unique microclimate. </span>
Aerial photographs are mostly taken from the air. Aerial photographs try to capture as much of the view as possible.
Your answer is: Air
Have an amazing day and stay hopeful!
Men and their moral rights because of religion
The climate 250 mya was very tropical, so maybe those fossils could've been found there even w/o continental drift
Yes because rivers are important for trade and even things like fresh water and transport.
