Explanation

Explanation

The drill method focuses on repeated practice to reinforce learning.

It is commonly used for memorization and skill development.

Explanation

 Convection is the transfer of heat through the movement of a fluid, meaning it occurs in liquids and gases. 

Liquids: In liquids, warmer, less dense molecules rise, carrying heat with them. 

Gases: Similarly, in gases, hot molecules move more readily, transferring heat through the space

Explanation

 He has eaten the pizza which he bought last night

 Correct. The sentence uses correct tense and article usage:

"has eaten" (present perfect) – recent action,

"which he bought last night" – past simple for a specific past time ("last night")

Explanation

 The UNHCR signed a memorandum of understanding with the Government of Bangladesh in April 2018.

This agreement established a framework for cooperation on the repatriation of Rohingya refugees

UNHCR  stands for the Office of the United Nations High Commissioner for Refugees

It is headquartered in Geneva, Switzerland.

Formation 14 December 1950

Explanation

The reporting verb "enquired" is in the past tense, so the reported speech also shifts to past: "wanted".

Correct indirect question structure is: "what he wanted", not question word order.

Explanation

The phrase "by October next" indicates a future point in time with a completed action.

So, the correct tense is future perfect, i.e., "will have served".

Explanation

 Closed System:

In a closed system, social status is largely determined at birth and individuals have limited or no ability to move up or down the social hierarchy. 

Examples of Closed Systems:

Traditional caste systems and feudal estate systems are examples of closed systems where social mobility is severely restricted

Explanation

Explanation

"Daunt" leads to a sense of being overpowered or intimidated

Just as "encourage" leads to being inspired or uplifted.