What discovery did the study of fossil horse teeth lead scientists to make? Early horses had a generalized diet of hard food items, including twigs.

Early horses had a specialized diet of grass, a soft food item.

Early horses had a specialized diet of bark, a hard food item.

Early horses had a generalized diet of soft food items, including leaves.

gas

explanation:

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in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.