Explanation

The given equation (a + b) + c = a + (b + c) is the standard form of the Associative Property of Addition.

It states that the grouping of numbers in an addition operation does not change the sum.

Explanation

Fertilization in frogs involves the fusion of male and female gametes — a clear example of sexual reproduction.

The budding, fission, vegetative propagation are all forms of asexual reproduction.

Explanation

The associative property of the union states that:

A ∪ (B ∪ C) = (A ∪ B) ∪ C

This means that the order in which we perform the union operation does not change the result.

Explanation

A cyclic quadrilateral is a four-sided figure where all vertices lie on the circumference of a single circle.

Key property: Opposite angles sum to 180°.

Explanation

A right bisector of a line segment is a line that cuts it into two equal parts at 90°.

It always passes through the midpoint of the segment.

Explanation

The septum is the muscular wall that separates the right and left sides of the human heart.

It prevents the mixing of oxygenated and deoxygenated blood between the two sides.

Explanation

42 ÷ 7 = Rs. 6 per folder

50 ÷ 6 ≈ Rs. 8.33 per folder

56 ÷ 8 = Rs. 7 per folder

72 ÷ 9 = Rs. 8 per folder

Explanation

Liquids have smaller intermolecular spaces compared to gases, allowing particles to be more tightly packed.

This closeness results in a higher density in liquids than in gases.

Explanation

He asked if I was going.

This is an indirect question, so it ends with a full stop, not a question mark or colon.

No comma is needed after "asked" in indirect speech.

Explanation

"Kindment" is not a correct English word.

The correct word should be "kindness" — the sentence should read:

"We should treat the young and old with kindness."