The striated walls are the result of erosion and frost weathering having exposed layers of multicolored sedimentary rock. Which choice completes the text so that it conforms to the conventions of Choose 1 answer: (A) patterns' of a canyons (B) patterns of a canyons' (C) pattern's of a canyon's (D) patterns of a canvon's

To determine the correct choice that completes the text, we need to analyze the grammatical structure and the possessive forms involved. The phrase "patterns of a canyons" suggests that we are looking for a plural form of "pattern" and a singular form of "canyon." Let's evaluate the options: (A) **patterns' of a canyons** - This suggests a possessive form for "patterns," which is incorrect in this context. Additionally, "canyons" is plural, which does not match with "a." (B) **patterns of a canyons'** - This also incorrectly uses the plural "canyons" with a possessive form, which is not appropriate here. (C) **pattern's of a canyon's** - This uses a possessive form for both "pattern" and "canyon," which is not necessary and incorrect. (D) **patterns of a canyon's** - This correctly uses the plural "patterns" and the singular possessive "canyon's," indicating that the patterns belong to a canyon. The correct choice is: **(D) patterns of a canyon's**