"Answer DThe outermost layer of old epidermal cells are sloughed off and replaced every 15 to 30 days. The sebaceous glands secrete sebum which maintains the skin pH between 3 and 5. Bacteria which metabolize sebum live as opportunistic pathogens on the skin and cause skin infections."
A. convective currents within the Earth.
Scientists believed convective currents within the earth is what caused lithospheric plate movements.
PUT YOUR HANDS UP AND GIVE ME YOUR POINTS!!
Answer:
Density is the mass per volume, so a simple example is if you have ever tried to mix water and oil. Oil is less dense than water, so it floats on top. A boat also floats for the same reason, Its average density is less that that of water (because of the air in the hull) so it can also float.
Explanation:
I copied this hope this helps you can use this for a information.