Explanation

Glass is an insulator, meaning it does not conduct electricity.

Aluminium, Copper, and Silver are excellent conductors of electricity.

Explanation

"Who" is a relative pronoun that refers back to "the boy".

It introduces the relative clause "who scored a fifty."

Explanation

Reported speech requires correct tense and structure.

After "He told us", we use "that" + past tense if the reporting verb is in the past.

"Enjoyed" matches the past tense of "told."

Correct sentence: He told us that he enjoyed the movie.

Explanation

The word "Peahen" is least like the other three, as "Peahen" refers to a female peacock.

While "Donkey", "Cow", and "Mare" are all different types of domesticated animals. 

Explanation

Tense: Present simple (They buy)

Passive structure: Object + is/are + past participle + by + subject

"Flowers" is plural → use "are"

Past participle of buy is bought

Correct passive voice:

Beautiful flowers are bought by them.

Explanation

This is an interrogative sentence (yes/no question).

• "Did you see" → "I had seen" (past simple → past perfect)
• "my" → "her"
• "this room" → "that room"
• "said to" → "asked"
• We can use "if" or "whether" in indirect questions.

So both are correct:

She asked me whether I had seen her daughter in that room.

She asked me if I had seen her daughter in that room.

Explanation

Longitudinal Wave (Primary Nature):

Sound propagates as compressions and rarefactions (particles vibrate parallel to wave direction).

Example: Sound waves in air.

Mechanical Wave (Medium Dependency):

Requires a medium (solid, liquid, gas) to travel—cannot propagate in a vacuum.

Transverse Wave (In Specific Cases):

In solids, sound can also exhibit transverse wave components (particles vibrate perpendicular to the wave direction).

Explanation

Original sentence is in future simple tense (active voice):

Subject + will + base verb + object

→ The team will celebrate their victory.

Passive voice structure for future simple:

Object + will be + past participle + by + subject

→ The victory will be celebrated by the team tomorrow.

Explanation

The formula for density is:

Density = Mass ÷ Volume

It represents how much mass is packed into a given volume.

Explanation

Every woman should vote for the candidate of her choice.

"Every woman" is singular.

Therefore, the pronoun should also be singular → "her", not "their".

"Their" is plural and incorrect for the singular noun woman.