hi guys! help with this pls u need to paste the link on you tube and answer the questions on the picture below. Have a good day ty! ( you need to watch the whole video to answer all these questions! )

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab. 

B. a graduated substance

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

The think of process to make something successful