Final answer:
The terms focus and earthquake can be used in the same sentence to refer to the origin point of seismic activity during an earthquake. For example, 'The focus of the earthquake was determined to be ten kilometers beneath the earth's surface, causing widespread tremors in the surrounding areas.'
Step-by-step explanation:
In the study of plate tectonics, focus and earthquake are terms that often come together. When an earthquake occurs, the point beneath Earth's surface where the seismic activity originates is known as the focus. To illustrate this, you can use these terms in a sentence as follows: 'The focus of the earthquake was determined to be ten kilometers beneath the earth's surface, causing widespread tremors in the surrounding areas.'
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