The structural unit of compact bone is called an osteon, or sometimes referred to as a Haversian system. Compact bone is made up of many osteons
Answer:
Severage water is most desasterous thing of urbun areas.
noise pollution also damage species
Explanation:
severage water contaminates rivers,canals and other water reserviours that can be harmfull for fish comunity moreover animal may drink water from that water bodies that causes problems in them.
contaminated water from industries also effects water bodies.
noise pollution disturb mental life of man as well as animals .
(B.) Sea levels rose over 300 feet
I think
