Explanation

The skin is considered the largest organ of the human body.

It covering an area of about 1.5-2 square meters (16-22 square feet).

It weighing around 3-4 kilograms (7-9 pounds).

Explanation

Vitamin D deficiency can cause Rickets, a disease characterized by:

• Soft and weak bones
• Skeletal deformities
• Stunted growth
• Increased risk of fractures

Explanation

• The audible range of a normal human ear is typically considered to be between 20 Hz (very low frequency) and 20,000 Hz (very high frequency).
• This range encompasses the vast majority of sounds that humans can perceive, from the lowest rumble to the highest pitch.

Explanation

Global warming is primarily caused by the increasing levels of carbon dioxide (CO2) in the Earth's atmosphere, which traps heat and leads to a warming effect.

The main reason for this increase is human activities such as:

• Burning fossil fuels like coal, oil, and gas
• Deforestation and land-use changes

Explanation

ICT is a term for information technology that stresses the role of unified communications and the integration of telecommunications.

ICT stands for Information and communications technology