Answer:
D. Mountains
Explanation:
Sinkholes are caused by cave ins, valleys are in between mountains, and buttes are most likely caused by erosion after the sand and soil got blown away. Mountains are caused by two plates slamming into each other and going sky-wise.
Thorium is an alternative and it is found in the earth's crust within Australia, United States, Turkey, and India
Answer:
Lipid
Explanation:
Lipid is known as a hydrophobic organic compound composed mainly of carbon and a high ratio of hydrogen to oxygen.
They usually form a large macromolecule and known to be insoluble in water and soluble in substances such as alcohol, ether which makes it non polar substances.
They are however very important and are major constituents of plants and animal cells