Meaning: 'Much' refers to a large quantity of something, in this case, tasks or responsibilities.

Wrong options:

• experience: 'Experience' is a verb that does not fit grammatically as it does not quantify the noun 'to do.'
• not enough: 'Not enough' is a phrase that implies a lack, but it does not serve as a quantifier for 'to do.'
• few borders: 'Few borders' is a noun phrase that does not relate to the quantity of tasks and does not fit in this context.
• bills: 'Bills' is a plural noun that does not quantify 'to do' and is unrelated to the concept of having too much to do.
• money: 'Money' is a noun that does not fit as it does not quantify the tasks or responsibilities in this context.
• experiencing: 'Experiencing' is a verb form that does not serve as a quantifier for 'to do.'

Correct answer: not enough

Explanation: The phrase 'not enough' serves as an adjective phrase that describes a lack of time or money. It fits grammatically and contextually as it highlights the insufficiency that contributes to stress.

Meaning: 'Not enough' indicates a deficiency or insufficient amount of something, in this case, time or money.

Wrong options:

• experience: 'Experience' is a verb that does not fit grammatically or contextually as it does not describe a lack of time or money.
• much: 'Much' is an adjective that implies a large quantity, which contradicts the idea of insufficiency in this context.
• few borders: 'Few borders' is a noun phrase that does not relate to the context of time or money and does not fit here.
• bills: 'Bills' is a plural noun that does not describe a lack of time or money and is unrelated to the sentiment of stress.
• money: 'Money' is a noun that does not fit as it does not describe a lack but rather a specific item.
• experiencing: 'Experiencing' is a verb that does not serve to describe a lack of time or money.

Correct answer: few borders

Explanation: The phrase 'few borders' is used to indicate that stress is a universal emotion that transcends geographical and cultural boundaries. It fits grammatically and contextually as it emphasizes the widespread nature of stress.

Meaning: 'Few borders' suggests that there are not many limitations or boundaries, indicating that stress is common across different regions.

Wrong options:

• experience: 'Experience' is a verb that does not fit grammatically or contextually as it does not describe the universality of stress.
• much: 'Much' is an adjective that does not relate to the concept of borders and does not fit in this context.
• not enough: 'Not enough' is a phrase that describes a lack, which does not align with the idea of borders in this context.
• bills: 'Bills' is a plural noun that does not relate to the concept of borders and does not fit here.
• money: 'Money' is a noun that does not describe the concept of borders and is unrelated to the universality of stress.
• experiencing: 'Experiencing' is a verb that does not serve to describe the concept of borders.

Correct answer: experiencing

Explanation: The word 'experiencing' is a gerund that functions as a noun in this context, indicating the action of feeling stress. It fits grammatically and contextually as it describes what people are doing on a daily basis.

Meaning: 'Experiencing' refers to the act of undergoing or feeling something, in this case, stress.

Wrong options:

• much: 'Much' is an adjective that does not fit grammatically as it does not describe an action or state of being.
• not enough: 'Not enough' is a phrase that does not serve as a noun and does not fit in this context.
• few borders: 'Few borders' is a noun phrase that does not relate to the action of feeling stress and does not fit here.
• bills: 'Bills' is a plural noun that does not describe the action of feeling stress and is unrelated to the context.
• money: 'Money' is a noun that does not fit as it does not describe the action of experiencing stress.
• experience: 'Experience' is a noun that does not fit grammatically in this context as it does not indicate the ongoing action of feeling stress.