It is called a watershed.
Hola!
<span>En la teoría de la música, una escala es cualquier conjunto de notas musicales ordenadas por frecuencia o tono fundamental. Una escala ordenada al aumentar el tono es una escala ascendente, y una escala ordenada por un tono decreciente es una escala descendente.
</span><span>¡Espero que esto ayude!
</span>
~Lauv
Darwin concluded that the sea level was high were it reached the mountain and as times passed sea level lowers down and clams were still on the mountain so when they died they were fossilized in the mountains. Hope this helps
Answer:
crude oil (petroleum) is the only natural liquid fossil fuel