Explanation

Chotiari Dam is another name for Baqar Lake.

It is also known as the "Jungle of Lakes".

It is a prominent feature of the Chotiari reservoir, which is an artificial water reservoir in the Sanghar district of Sindh, Pakistan.

The reservoir is fed by the Nara Canal.

Explanation

Direct: The secretary said, "Is Mr. Hyder in his office?"

It’s a yes/no question, so:

"said" becomes enquired

The question is changed to a statement structure

Present tense is becomes past was

Use if or whether for indirect questions

So,

Indirect: The secretary enquired if Mr. Hyder was in his office.

Explanation

According to DeMorgan's Law:

(𝐴 ∪ 𝐵)′ = 𝐴′ ∩ 𝐵′

This states that the complement of the union of two sets is equal to the intersection of their complements.

Explanation

The indirect sentence is a command, so the direct speech should be an imperative sentence.

"His father ordered him to go..." becomes:

"His father said to him, 'Go to your room and study.'"

It preserves both the instruction and the original meaning accurately.

Explanation

This is a yes/no interrogative sentence in direct speech.

Direct:

The salesman said to me, "Are you interested in the scheme?"

Rules for indirect speech:

"said to" becomes asked (since it's a question)

The question form is changed to a statement form

"Are" becomes was

Use if or whether for yes/no questions

So,

Indirect: The salesman asked me if I was interested in the scheme.

Explanation

Let's analyze the situation:

When Iqra puts 2, 3, or 4 sweets in a pack, she is left with 1 sweet. This means the total number of sweets is 1 more than a multiple of 2, 3, and 4.

The least common multiple (LCM) of 2, 3, and 4 is 12. So, the number of sweets can be represented as 12k + 1, where k is an integer.

When she puts 7 sweets in a pack, all sweets are packed, meaning the total number of sweets is a multiple of 7.

Let's check the options:

49 = 12(4) + 1 and 49 = 7 × 7

So, 49 satisfies both conditions.

Explanation

Frogs, sharks, and snakes are all cold-blooded vertebrates — their body temperature depends on the environment.

They belong to different classes: amphibians (frogs), fish (sharks), and reptiles (snakes), but all are ectothermic.

Explanation

An octopus has three hearts — two pump blood to the gills, and one pumps it to the rest of the body.

When it swims, the main heart temporarily stops beating to conserve energy.

Explanation

I asked Riaz who he was waiting for.

The question "Who are you waiting for?" changes to "who he was waiting for" in indirect speech.

The tense shifts from present continuous to past continuous, and "you" changes to "he".

No question mark is used in indirect speech.

Explanation

Let's assume the original price is 100.

After a 20% discount, the price becomes:

100 - 20% of 100 = 100 - 20 = 80

To get back to the original price of 100, the increase needed is:

100 - 80 = 20

The percentage increase needed on the discounted price (80) is:

(20 / 80) × 100 = 25%