Explanation

The phrase "look down upon" is an idiomatic expression meaning to regard someone with contempt or disdain.

The correct sentence is:

"The rich should not look down upon the poor."

Explanation

The sentence refers to yesterday, indicating a past event, so past simple tense is needed.

"Did not come" is the correct negative form of the past simple tense, as "did" already carries the past meaning.

Explanation

Bayazid Ansari, a 13th-century scholar, wrote Kitab Tarikh-i-Awila.

It is a historical text focusing on the early history of the region.

Explanation

Lenore Hetrick was an American poet known for writing simple, nature-themed poems for children.

"Golden Sun" is one of her popular works that reflects appreciation for nature’s beauty.

Explanation

To find the Highest Common Factor (HCF) of 12, 18, and 30, we follow these steps:

Find the prime factors:

12 = 2 × 2 × 3

18 = 2 × 3 × 3

30 = 2 × 3 × 5

Identify common factors:

Common prime factors: 2 and 3

Multiply them: 2 × 3 = 6

Explanation

Lowland plains cover more than 50% of the Earth's crust, including river valleys and coastal areas.

These regions are fertile and densely populated, supporting agriculture and human settlements.

Explanation

A black dwarf is the final stage of a low-mass star, after it has cooled and no longer emits significant heat or light.

It forms when a white dwarf loses all its residual thermal energy over billions of years.

Explanation

"Who stands first" is a relative clause because it describes "the boy" using the relative pronoun "who."

Relative clauses provide additional information about a noun and usually begin with who, which, or that.

Explanation

Smoking increases the risk of blood clots forming in arteries supplying the heart and brain.

These clots can lead to life-threatening conditions like heart attacks and strokes.

Explanation

Badar is an Urdu/Arabic term meaning full moon.

It refers to the complete visible Moon in the sky (Full Moon phase).