Answer:
<em>hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>
How a bridge is built at the base can affect how far it can extend.
Well one way is how hurricane winds and such can blow birds off course. Another is how when trees fall down that forces animals to relocate.
Air pressure would be considered to calculate wind and chill factor. Also air temperature would be considered one to.