Explanation

حضرت ابو طالب کی وفات رجب 10 نبوی میں ہوئی۔

ان کی وفات کے بعد یہ سال عام الحزن (غم کا سال) کہلایا۔

Explanation

The complement of a null set (∅) includes all elements of the universal set (U).

Since ∅ contains nothing, its complement is everything in U, so ∅' = U.

Explanation

Smog is caused by pollutants like sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), which are released from burning fossil fuels (coal, oil, and gas).

These pollutants react with sunlight to form ground-level ozone and particulate matter, leading to smog formation.

Explanation

Joe Biden becomes oldest person ever to be elected as US President in U.S history.

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According to Article II of the U.S. Constitution, the president must be a natural-born citizen of the United States, be at least 35 years old, and have been a resident of the United States for 14 years.

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Explanation

Gas exchange in the alveoli occurs through simple diffusion, where oxygen moves from high concentration in the alveoli to low concentration in the blood, and carbon dioxide moves in the opposite direction.

This process does not require energy as it follows the concentration gradient.

Explanation

"Located" describes the state or position of the house.

Past participles (like "located") can function as adjectives when they describe a noun.

Explanation

A teacher encourages students to engage, explore, and think critically, making them active learners.

Active learning improves understanding, retention, and problem-solving skills.

Explanation

محمد بن قاسم کے سندھ پر حملے (712 عیسوی) کے وقت اسلامی حکومت بنو امیہ کے تحت تھی۔

اس وقت دمشق خلافت بنو امیہ کا دارالحکومت تھا۔

Explanation

The older child reinforces their own learning while teaching.

The younger child gains knowledge and guidance from the older one.

Explanation

The liver plays a key role in the digestive system by producing bile, which helps in fat digestion.

It also processes nutrients, detoxifies chemicals, and regulates metabolism.