Meaning: 'Involves' means to include or require something as a necessary part or condition.

Wrong options:

• requires: 'Requires' suggests a necessity but does not convey the process aspect as effectively as 'involves'.
• includes: 'Includes' implies that something is part of a whole but lacks the active connotation of a process that 'involves' provides.
• reflects: 'Reflects' means to show or demonstrate, which does not fit the context of describing a process.

Correct answer: grain

Explanation: The word 'grain' accurately describes a small, specific size that is comparable to a microchip, fitting the context of the sentence. It is a countable noun that aligns with the phrase 'the size of a'.

Meaning: 'Grain' refers to a small, hard seed or a tiny piece of something, often used to describe the size of objects.

Wrong options:

• crumb: 'Crumb' refers to a small piece of bread or cake, which is less precise in size compared to 'grain'.
• speck: 'Speck' implies an even smaller size than 'grain', which may not accurately represent the size of the microchip.
• bean: 'Bean' is larger and does not fit the context of describing something as small as a microchip.

Correct answer: prevent

Explanation: The word 'prevent' indicates the action of stopping something from happening, which fits grammatically and contextually as it describes the inability of data-tagging to stop theft.

Meaning: 'Prevent' means to stop something from occurring or to hinder an action.

Wrong options:

• preserve: 'Preserve' means to maintain something in its original state, which does not fit the context of stopping theft.
• prohibit: 'Prohibit' implies a legal or formal ban, which is not the intended meaning in this context.
• protect: 'Protect' suggests safeguarding but does not convey the idea of stopping theft as directly as 'prevent'.

Correct answer: chances

Explanation: The word 'chances' refers to the likelihood of recovering the trees, fitting well in the context of increasing the probability of getting them back. It aligns grammatically with the phrase 'increase the'.

Meaning: 'Chances' means the possibilities or likelihood of something happening.

Wrong options:

• count: 'Count' refers to the total number of items, which does not fit the context of likelihood or probability.
• choices: 'Choices' implies options available, which does not relate to the probability of recovering stolen items.
• claims: 'Claims' refers to assertions or demands, which does not fit the context of likelihood.

Correct answer: installing

Explanation: The word 'installing' indicates the action of setting up a security alarm system, fitting grammatically and contextually as it describes an ongoing action that Paul is taking.

Meaning: 'Installing' means to set up or put in place, particularly in reference to equipment or systems.

Wrong options:

• investing: 'Investing' implies putting money into something for profit, which does not fit the context of setting up a security system.
• inserting: 'Inserting' suggests placing something into another object, which does not accurately describe the action of setting up a system.
• inputting: 'Inputting' refers to entering data into a system, which is not the correct action in the context of installing a physical alarm system.