What is the most valuable resource in North America for the European colonists

Two grizzly bears are fighting over a fish to feed themselves. what kind of interaction is this scenario, which works as a limiting factor in the bears' survival? a. apparent competitionb. interference competitionc. exploitation competitiond. mutualism

Gettysburg address question what do you notice about the length of this address? why do you think lincoln made it so short?

This description of the "firm league of friendship" of states is a quotation from the