Explanation

Adding "ion" to "fascinate" forms "fascination," changing the verb to a noun.

"Fascination" refers to the state or quality of being fascinated.

Explanation

The correct structure for habitual actions is "usually + verb".

In this case, "usually reads" fits the sentence.

Explanation

"So" is the conjunction in the sentence, as it connects two clauses: the reason (he was tired) and the result (he went to bed early).

It shows cause and effect between the two actions.

Explanation

Threadworms (pinworms) commonly cause itching around the anus, especially at night when female worms lay eggs.

This itching is the most common symptom, particularly in children.

Explanation

The correct phrase is "afraid of", which is always followed by a noun, pronoun, or gerund (like being dropped).

"Afraid of" is the standard prepositional phrase used to express fear about something.

Explanation

Discontinuous variation involves traits like blood group or tongue rolling, where individuals fall into clear, separate categories.

There are no intermediate states—either you have the trait or you don’t.

Explanation

Reforming is the process used to separate hydrogen from hydrocarbons (like methane or naphtha) by applying heat in the presence of a catalyst.

This is typically called steam methane reforming (SMR).

Explanation

Given x = 1 is a solution, let's find 'a':

a(1)² + 5(1) - 3 = 0

a + 2 = 0

a = -2

The equation is -2x² + 5x - 3 = 0.

Let's factor or solve:

-2x² + 5x - 3 = 0

-2x² + 2x + 3x - 3 = 0

-2x(x - 1) + 3(x - 1) = 0

(-2x + 3)(x - 1) = 0

x = 1 (given) or x = 3/2

The other solution is x = 3/2.

Explanation

Conductivity is a physical property that describes how well a material allows heat or electricity to pass through.

Reactivity and toxicity are chemical properties, as they involve changes in the substance's composition.

Explanation

"Beat around the bush" is an idiom meaning to avoid saying something directly or not addressing the main point.

It is used when someone is being indirect or evasive.