Final answer:
UV radiation from sunlight is classified as a physical hazard because it is part of the electromagnetic spectrum and can harm living tissues. This form of radiation can ionize molecules and damage DNA, potentially leading to skin cancer and genetic abnormalities. Therefore, the correct answer is b) Physical.
Step-by-step explanation:
Some ongoing natural phenomena, such as ultraviolet (UV) radiation from sunlight, represent Physical hazards. This is because UV radiation is part of the electromagnetic spectrum and can have significant effects on biological tissues.
For example, UV radiation has the energy to ionize atoms and molecules, leading to damage in DNA structures within the cells. Known health risks associated with prolonged UV exposure include skin cancer and other forms of somatic or genetic damage.
Regarding the multiple-choice questions, the portion of electromagnetic radiation originating from the sun that is harmful to living tissues is the ultraviolet (UV) portion.
When it comes to measuring the energy of a wave, traits such as amplitude and frequency can be used. In terms of radiation, these characteristics are associated with radiative forcing and the energy imparted to biological systems, leading to the potential for damage.