Answer:
Radioactive- giving off radiation, which can be harmful to one's health.
Sterilize- to remove harmful bacteria and other germs.
Alternative- not usual.
Pasteurization- the process of heating something up to kill bacteria and then cooling it.
Heredity- the process of passing on characteristics to offspring.
Explanation:
The given words and the phrases that best defines them are as follows-
Radioactive is the state of a matter that emits radioactive radiation. This radiation is harmful to the health of human beings.
To sterilize is to clean it, to make something safe for use. It is the removal of harmful bacteria and any other germs that may be present.
An alternative is an option of having another choice or something that is not usually chosen or picked.
Pasteurization is the process food products are heated and then cooled again, to make them safe for human consumption. This heating and cooling process kills the bacteria present in the food.
Heredity is the genetic code/ heritage that is passed down from one generation to another.
