Explanation

Sunlight entering the water may travel about 1,000 meters into the ocean under the right conditions,

but there is rarely any significant light beyond 200 meters.

The ocean is divided into three zones based on depth and light level.

The upper 200 meters of the ocean is called the euphotic, or "sunlight," zone

ND5-07-2023

Explanation

Omer-Khayam was born in Iran in 1048 AD.

Omer-Khayam was a poet, Mathematician & Astronomer. 

Omer-Khayam introduced the modern Solar Hijri calendar, the Jalali calendar.

Place of burial: Tomb of Omar Khayyam, Iran

Main interests:

Mathematics (medieval Islamic); astronomy; Persian philosophy; Persian poetry

Explanation

There are three subatomic particles: protons, neutrons and electrons.

Two of the subatomic particles have electrical charges: protons have a positive charge

while

electrons have a negative charge.

Neutrons, on the other hand, don't have a charge.

ND11-07-2023

Explanation

Galileo di Vincenzo Bonaiuti de' Galilei was an Italian astronomer, physicist and engineer, sometimes described as a polymath. 

Galileo was the first to point out the obvious: all motion is relative.

Galileo Galilei is famous for:

 he was the first to report telescopic observations of the mountains on the moon,

the moons of Jupiter, the phases of Venus,

and the rings of Saturn

He invented an early microscope and a predecessor to the thermometer.

ND11-07-2023

Explanation

It has been raining since last night.

We normally use 'since' with the present perfect(had been) to describe an action or situation that began in the past and continues in the present

Explanation

'He is poor, yet he is honest'.

Here 'yet' will be used as a conjunction.

Sentence - Though he is poor, he is honest.

Main Clause - He is honest.

Subordinate Clause - Though he is poor.

Explanation

we could use ‘if he were’, if the events are imagery or improbable.

‘If he were’ can be used when expressing an imaginary situation in the present that is definitely not true.  

In the given question, he behaves like a king, which is an imaginary situation 

So we have used ‘if he were’, instead of using ‘if he was’.

Explanation

No, sooner I reached home than it started to rain.

نہیں، میں گھر پہنچتے ہی بارش شروع ہو گئی۔

Sentence structure: No sooner + auxiliary + subject + main verb + than + subject + simple past 

'No sooner..than' is used to suggest that one action takes place immediately after another action.

When 'no sooner..than' is used at the beginning of the sentences then the auxiliary verb goes before the subject.

No sooner always introduces the event that occurred first.

Explanation

“should” is used to indicate something which is probable.

Here in this case Probability of failure on not working hard.

The sentence, in this case, will be “Work hard lest you should fail”. 

Explanation

Ayaan is older than all the other boys in this area.

older means : a comparative of old ( an adjective)

'Older' is followed by 'than'

whereas 'elder' is followed by 'to' in a sentence when there is a comparison