Explanation

Loudness is how the intensity of a sound is perceived by the human ear.

Greater intensity → louder sound.

It is measured in decibels (dB).

Explanation

Infrasonic sounds have frequencies below 20 Hz, which are too low for human hearing.

Ultrasonic refers to sounds above 20,000 Hz.

Audible is the range between 20 Hz and 20,000 Hz.

Explanation

This is an example of the associative property of multiplication:

  a × (b × c) = (a × b) × c

So, 8 × (6 × 7) = (8 × 6) × 7

Explanation

The associative property w.r.t addition states that the order in which we add numbers does not change the result.

The correct equation is:

1 + (4 + 3) = (1 + 4) + 3

This equation represents the associative property of addition.

Explanation

"Grew" here does not describe a physical action.

But instead connects the subject ("She") to its complement ("a lively young woman"), showing a state of transformation.

Linking verbs (e.g., become, seem, appear) tie the subject to a description or identity.

Unlike action verbs (e.g., run, jump).

Explanation

'Herself' reflects back to the subject 'She', showing the action is done by the subject to herself.

Reflexive pronouns end in -self or -selves.

They are used when the subject and object are the same person.

Explanation

The sentence is in simple past tense → He decorated.

Passive form of simple past is:

was/were + past participle → were decorated.

Explanation

"Several" refers to an indefinite number, indicating how many mistakes — qualifying it as an Adjective of Number.

It also shows quantity (not exact), so it works as a Quantity Adjective too.

Explanation

The correct preposition is "on" because the spider is attached to the surface of the ceiling.

"On the ceiling" means something is resting or moving along its surface.

Explanation

• National Assembly (Lower House)
• Senate (Upper House)

• Headed by the President of Pakistan
• Actual executive powers are exercised by the Prime Minister and the Cabinet

• Independent branch with authority vested in the Supreme Court
• Ensures the interpretation and enforcement of the Constitution