Original jurisdiction refers to

a. the supreme courts authority to hear a case for the first time
b. the supreme courts authority to hear a case from a lower court
c. a lower courts authority to hear a case from the executive branch
d. a lower courts authority to hear a case from the legislative branch

A is correct, in part.

A Court with original jurisdiction is one, at any level, that has the right to hear a case for the first time.

The Supreme Court rarely has original jurisdiction.

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