I will go with 4th one.....they involve advance biotechnology.....so there is a separate subject !!!
A. The burning of large quantities of fossil fuels which take millions of years to replenish
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
Blood test will be great to do and just know what infections you doing before you give the blood test.
Answer:
individuals of the same species that live in the same area
