Answer:
The three main parts of the earth are the crust, the mantle, and the core.
Explanation:
Hope this helps!
That would be the urethra
The best answer to fill in the blank would be B) Small intestine or the second option.
I am going to go with steroids because they are a type of lipid.
Answer:
The correct answer is physical boundary.
Explanation:
In my opinion, the kind of boundary it signifies is the physical boundary. The physical boundary is the most general type and is a naturally taking place obstruction in between the two regions due to the existence of either an ocean, river, desert, or mountain ranges. At various occasions, the political boundaries between the states or the countries form along the physical boundaries.