Explanation

"By" means next to or beside someone.

So, "My sister sat by my mom in the bus" is the correct sentence.

Explanation

The sentence is in passive voice (future tense) — "will be written".

Its active voice is: "The teacher will write a letter."

Explanation

"From" is used to show removal or separation (taking something away).

So, "I had to take my book from the table" is correct.

Explanation

Inverse Proportion:

When one quantity increases, the other decreases in such a way that their product remains constant.

Example: Speed increases → Time to cover the same distance decreases.

Direct Proportion:

When one quantity increases, the other also increases at the same rate.

Example: More hours worked → More wages earned.

Explanation

Hastened means to move or act quickly — the same as rushed.

Hastened means جلدی

Rushed means جلدی

Celerity means جلدی

Explanation

He told me that he had the duty.

Present perfect ("have") changes to past perfect ("had") in indirect speech.

Explanation

A Trap door (or backdoor) is a hidden entry point into a system that bypasses normal authentication, making it a serious security threat.

Unlike viruses or worms, it allows unauthorized access without detection, potentially exposing entire systems.

Explanation

Explanation

An algorithm is a step-by-step, well-defined list of instructions written in natural or simple language to solve a specific problem.

It serves as a blueprint for writing a program or creating a flowchart.

Explanation

"The best" is the superlative form used when comparing one person against all others.

It means Kamal writes better than everyone else.