Which of the following is a layer of the solid Earth?
A.
biosphere
B.
atmosphere
C.
convecting mantle
D.
Ring of Fire

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

What protects the lining of the stomach from acidic gastric juices?

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking