Radiation is considered harmful because it:
a. is unpredictable
b. contains isotopes
c. is cumulative
d. causes tissue to become fluorescent

Is cumulative

Explanation:

Radiation can be defined as the way by which heat moves around. Low level of radiations are found everywhere and are known as background radiation.

When it comes to the effect of radiation, it is cumulative. Its effect on the body increases as it travels inside the body. There is an increased chances of malignant tumor incase of radiations.

The intensity of radiation increases with time and hence, it is cumulative.

5. method

15. communicate, transport

18. component

21. learn

22. preceding

23. display

24. area

25. anomalous, unusual, unconventional

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