Meaning: 'Scientifically' means in a manner based on or characterized by the methods and principles of science.

Wrong options:

• diminish: The verb 'diminish' means to make or become less, which does not fit grammatically or contextually as it contradicts the idea of proving benefits.
• artificially: The adverb 'artificially' implies something is done in a way that is not natural, which does not align with the context of natural environments being proven to have benefits.
• urban: The adjective 'urban' refers to areas characteristic of a city, which is irrelevant in the context of discussing natural environments and their effects on mental health.

Correct answer: forested

Explanation: The adjective 'forested' describes the type of park being referred to, indicating that it is covered with trees. This fits grammatically as it provides a specific description of the noun 'park,' enhancing the context of nature's calming effects.

Meaning: 'Forested' means covered with trees, typically referring to areas that are rich in vegetation.

Wrong options:

• urban: The adjective 'urban' describes city-like areas, which contradicts the context of a natural park and does not fit grammatically as a descriptor for 'park.'
• scientifically: The adverb 'scientifically' does not fit as it does not describe a noun and is irrelevant in this context of describing a park.

Correct answer: significantly

Explanation: The adverb 'significantly' modifies the verb 'improve,' indicating that the improvement is considerable or meaningful. This fits grammatically as it describes the extent of the improvement in focus and productivity, aligning with the context of discussing the benefits of nature.

Meaning: 'Significantly' means in a way that is important or noticeable, indicating a substantial effect.

Wrong options:

• artificially: The adverb 'artificially' implies a lack of authenticity, which does not fit the context of discussing genuine improvements in focus and productivity.
• diminish: The verb 'diminish' means to reduce or lessen, which contradicts the context of improving focus and productivity.

Correct answer: bolstering

Explanation: The gerund 'bolstering' serves as a noun here, indicating the action of supporting or strengthening the benefits on mental wellness. This fits grammatically as it complements the verb 'encourages,' maintaining the logical flow of the sentence.

Meaning: 'Bolstering' means to support or strengthen, particularly in the context of enhancing benefits.

Wrong options:

• diminish: The verb 'diminish' means to reduce, which contradicts the context of enhancing benefits and does not fit grammatically.
• artificially: The adverb 'artificially' implies a lack of authenticity, which does not align with the context of genuine benefits to mental wellness.