Explanation

Darwin himself bred pigeons.

He used selective breeding of pigeons to study and demonstrate the principles of natural selection and variation in species.

Explanation

The 18th Amendment was enacted in 2010.

It extended the tenure of local government bodies from three to five years.

Explanation

The title 'To Kill a Mockingbird' is correctly capitalized according to title capitalization rules.

According to title capitalization rules, the first and last words of a title are always capitalized.

All major words in the title, such as nouns, pronouns, verbs, adjectives, and adverbs, should also be capitalized.

Explanation

The book, lying on the table, is mine.

The participial phrase "lying on the table" is correctly set off by commas, describing the book.

The sentence maintains correct punctuation and clear meaning.

Explanation

The pineal gland produces melatonin.

This hormone helps regulate sleep-wake cycles and circadian rhythms.

Explanation

When I was a child, I used to go to the beach every summer.

"Used to go" is used to describe a habitual action in the past.

It indicates that going to the beach was a regular activity every summer during childhood.

Explanation

If it rains, we will stay indoors.

The first conditional expresses a real possibility in the future.

It using the present simple tense in the "if" clause and "will" in the main clause.

Explanation

When I arrived, she was waiting for me.

جب میں پہنچا تو وہ میرا انتظار کر رہی تھی۔

The past continuous tense "was waiting" is used to describe an action that was ongoing at a specific time in the past when another action occurred ("I arrived").

This tense highlights that she was already in the process of waiting when you arrived.

Explanation

The "Green Line" refers to the boundary between Pakistan and India.

It specifically the ceasefire line established after the 1947-48 Indo-Pakistani War.

Explanation

She decided to learn a new language.

After the verb "decided," the correct infinitive form is "to learn."

Infinitives typically follow certain verbs like "decide" to express intention or purpose.