Final answer:
The sentence 'Certain kinds of soil are more __________ to growing prize roses.' should be completed with the word 'conducive,' which indicates that the soil provides the right conditions for growing roses.
Step-by-step explanation:
The correct word to complete the sentence “Certain kinds of soil are more conducive to growing prize roses.” is conducive. This word means providing the right conditions for something to happen or occur. Therefore, soils that are conducive to growing roses are those that offer the best environment for their growth, such as the correct pH levels, nutrients, and texture. The other options don't fit the context of the sentence: 'evinced' means to display clearly, 'deduced' means to derive as a conclusion from something known or assumed; 'induct' means to formally admit to a position or organization, and 'impetuous' describes an action done quickly without thought or care.