Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

Explanation

Iron deficiency can lead to Anaemia, a condition characterized by:

• Low red blood cell count
• Pale skin
• Fatigue
• Shortness of breath
• Dizziness

Explanation

COVID-19 is caused by a virus, specifically the SARS-CoV-2 virus.

The first infections with SARS-CoV-2 appeared in Wuhan in 2019.

Explanation

Detailed Answer

One light year is equal to the distance that light travels in one year

(it is about ten trillion kilometers or six trillion miles).

A light year is a unit of distance.

The distance light travels in one year is known as light year.

A light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometers (9.46 x 1012 km) or 5.88 trillion miles (5.88 x 1012 mi)

Explanation

Gases and particles in Earth's atmosphere scatter sunlight in all directions.

Blue light is scattered more than other colors because it travels as shorter, smaller waves.

This is why we see a blue sky most of the time.

ND-21-5-2023

Explanation

Sound wave is a mechanical  wave.

Explanation

Methane is the simplest of saturated hydrocarbons with a chemical formula CH4.

It consists of four hydrogen atoms and one carbon atom.

It is the simplest alkane.

Explanation

Ultra Violet rays: most harmful and are almost completely absorbed by our atmosphere.

Explanation

The term "AI" could be attributed to John McCarthy 

Explanation

John McCarthy is recognized as the father of Artificial Intelligence due to his astounding contribution in the field of Computer Science.

John McCarthy was an American computer scientist

Note: Artificial Intelligence is a branch of Computer science, which aims to create intelligent machines so that machine can think intelligently in the same manner as a human does.