Abiological community in yellowstone national park most likely includes forest fires. geothermal activity. population of aspen trees. seasonal rainfall. low temperatures in winter.

The valve seat performs two functions: it provides a seal for the valve in the combustion chamber, and it provides a cool surface to carry heat away from the valve. most valves use a seating angle.

Summarize deleon's advice to the strikers

States might choose to cooperate at the regional or global level for all of the following reasons except (2 points) a.) to gain regional political influence b.) to engage in dispute resolution c.) to assure basic human rights d.) to encourage economic interaction e.) to increase national sovereignty