Which of the following was a cause of americans moving west in the early to mid 1800

They wanted to have land that they could farm.  The east was already crowded by large farms and cities.  They were also in search of gold.  There were also many trees that could be cut down and sent east, these people sought out a way to make money, or provide for their families that was not in the congested dirty cities of the east.

Explanation:

the answer is true!                                          

those sounds of the natural world are bioacoustics, and they're more than a false-color spectrogram of data from the musiamunat conservation area.