Meaning: 'Tamed' means to domesticate or train an animal to be obedient and manageable.

Wrong options:

• achieved: 'Achieved' is a verb that means to successfully reach a goal, which does not fit the context of training animals.
• collected: 'Collected' implies gathering items or people, which is not relevant to the process of domestication.
• corresponded: 'Corresponded' means to communicate or match, which does not relate to the action of training dogs for specific tasks.
• suited: 'Suited' is an adjective that describes compatibility, but it does not convey the action of training or taming.

Correct answer: suited

Explanation: The word 'suited' is the past participle of 'suit,' which fits grammatically as it describes the breeds' compatibility with various tasks. It aligns with the context of selective breeding, indicating that each breed was developed for specific purposes.

Meaning: 'Suited' means appropriate or fitting for a particular purpose or task.

Wrong options:

• achieved: 'Achieved' does not fit as it refers to reaching a goal rather than describing compatibility with tasks.
• tamed: 'Tamed' describes the action of training, which does not fit the context of describing breeds' characteristics.
• widespread: 'Widespread' describes something that is common or prevalent, which does not relate to the suitability of breeds for tasks.
• collected: 'Collected' implies gathering, which is not relevant to the context of breeding and suitability.

Correct answer: widespread

Explanation: The word 'widespread' is an adjective that describes something that is common or prevalent. It fits grammatically and contextually, as it describes the extensive presence of dogs as domestic animals around the world.

Meaning: 'Widespread' means distributed over a large area or among many people.

Wrong options:

• achieved: 'Achieved' refers to reaching a goal, which does not describe the extent of dogs' presence.
• tamed: 'Tamed' describes the process of domestication, not the prevalence of dogs as domestic animals.
• suited: 'Suited' describes compatibility, which does not relate to the commonality of dogs.
• estimated: 'Estimated' refers to an approximation, which does not fit the context of describing the popularity of dogs.

Correct answer: estimated

Explanation: The word 'estimated' is the past participle of 'estimate,' which fits grammatically as it describes the approximation of the dog population. It aligns with the context of providing a numerical figure based on calculations or assessments.

Meaning: 'Estimated' means calculated or approximated based on available information.

Wrong options:

• achieved: 'Achieved' does not fit as it refers to reaching a goal rather than providing an approximation.
• tamed: 'Tamed' describes the action of domestication, which does not relate to estimating a population.
• widespread: 'Widespread' describes the extent of presence, not the act of estimating a number.
• suited: 'Suited' describes compatibility, which does not fit the context of estimating a population.