Which of the following ratios would indicate an absent sinuosity?

An absent sinuosity is indicated by a specific ratio that measures the degree of curvature in comparison to a straight line. A ratio of 1 signifies a perfectly straight path or line, where there is no curvature at all. This indicates that the two points being measured are directly aligned without any bends or sinuous formations in between.

In contrast, a ratio greater than 1 represents an increasing degree of curvature or sinuosity, suggesting that the path between the two points isn’t straight but instead has bends or curves. Therefore, a ratio of 1 clearly denotes the absence of sinuosity, making it the correct choice for this question.

While the other ratios (1.2, 1.3, and 1.4) imply varying degrees of curvature, they do not signify a straight path, so they are not indicative of absent sinuosity. Thus, the presence of curvature in any of those values demonstrates that they cannot represent an absence of sinuosity.