Explanation

The surface area of a sphere depends only on the radius (r) and is given by the formula 4πr².

This formula comes from calculus and represents the total area covering the outer layer of a perfect sphere.

Explanation

Explanation

Projects and assignments are often structured with specific objectives and grading criteria, making them more formal assessments.

Informal assessments like observation, discussion, and participation are more spontaneous and flexible.

Explanation

Asking questions helps to engage students actively in the lesson.

It draws their attention and promotes critical thinking and participation.

Explanation

Cotton is known as the "Silver Fibre" of Pakistan due to its economic importance and export value.

It plays a key role in Pakistan’s textile industry, the backbone of the country's economy.

Explanation

The word "Please" indicates a request, so the reporting verb becomes "requested".

The verb tense and pronouns are correctly changed in indirect speech.

Explanation

Snails are mollusks, belonging to the phylum Mollusca.

They typically have a soft body and, in many cases, an external shell.

Explanation

Ajrak is a traditional block-printed shawl and symbol of Sindhi culture.

It is commonly worn during cultural events and gifted as a sign of respect in Sindh province.

There are 22 processes in Ajrak printing and is very tedious and time consuming. 

Explanation

His tattered coat needs mending means اس کے پھٹے ہوئے کوٹ کو ٹھیک کرنے کی ضرورت ہے

"Tattered" is the correct adjective meaning torn or worn out.

The sentence needs an adjective to describe the condition of the coat — hence, "tattered coat" fits best.

Explanation

Foundations of curriculum include philosophical, psychological, social, and historical factors that influence how a curriculum is developed.

They provide the base upon which curriculum decisions are made.