Explanation

• Approximately 7–8% of an adult’s body weight
• Approximately 8–9% of a child’s body weight
• Approximately 9–10% of an infant’s body weight

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Blood is a body fluid present in animals that consists of plasma, white blood cells, red blood cells, and platelets.

humans have around 5 liters of blood in their bodies.

The volume of blood is approximately 5.5 liters in each adult male and 4.5 liters in female.

Explanation

The correct question tag is "will you."
It politely requests the listener’s confirmation or assistance.
This matches the future-oriented tone of "If you come across my keys."

Explanation

Young : Old :: Morning : Evening

Explanation

The phrase "under the shadow of the tree" is commonly used in English to indicate sitting within the shade provided by the tree.

So, the complete sentence is: He sat under the tree's shadow.

Explanation

"So much" expresses the quantity of trouble, while "that" introduces the result of parking the car in the garage. 

The phrase "so much...that" is commonly used to indicate cause and effect.

Explanation

Straw, camphor, alcohol, petrol, diesel etc. catch fire easily to release heat energy and light energy.

So, these are examples of combustible substances.

Explanation

An optical fiber is a flexible,

transparent fiber made by drawing glass  or plastic

To a diameter slightly thicker than that of a human hair.

Explanation

U Thant was a Burmese diplomat and the third Secretary-General of the United Nations from 1961 to 1971.

First non-Scandinavian to hold the position.

He held the office for a record 10 years and one month.

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  RY 15-01-2023

Explanation

The Iraqi invasion of Kuwait was an operation conducted by Iraq on 2 August 1990

Persian Gulf War, also called the Gulf War, (1990–91), international conflict that was triggered by Iraq’s invasion of Kuwait 

Explanation

Currently, about 80% of the world’s goods trade by volume is carried on ships.

Maritime transport is crucial, handling over 70% of global trade by value.