Select the option that can be used as a one-word substitute for the given group of words. A line at which the earth's surface and the sky appear to meet

Explanation

The correct answer is: Horizon. Key Points Horizonmeans the place in the distance where the earth and sky seem to meet. Example -The sun rose above the horizon . So, it is clear that the 'Horizon 'can be used as a one-word substitute for 'A line at which the earth's surface and the sky appear to meet .' Therefore, the correct answer is option 2 . Additional Information Equatormeans a line notionally drawn on the earth equidistant from the poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°. Peripherymeans the outer limits or edge of an area or object. Boundarymeans a line that marks the limits of an area; a dividing line.