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Final answer:Fresco painting is best suited for dry climates because the plaster used in frescoes requires a dry climate to cure properly and ensure pigment adherence. Dry climates facilitate the chemical reaction necessary for buon fresco, securing the paint's longevity and preventing damage more effectively than in humid environments.Explanation:Fresco painting is best suited for dry climates because the plaster used for the fresco requires a dry environment to cure and adhere properly. Buon fresco, or "true fresco," involves applying paint made from pigment mixed with water directly onto wet plaster. The chemical reaction between the plaster and the air, as the plaster dries, cements the pigment in place. Since this reaction is less effective in humid environments, where the drying process is slowed, dry climates provide optimal conditions for the plaster to set and preserve the paint. Fresco paintings, like the extensive frescoes in Mandawa, India, retain their original colors for centuries if the plaster remains undamaged.Fresco secco, on the other hand, is applied to dry plaster and requires a binder such as egg tempera to help the pigment adhere to the wall. However, this method is less durable than buon fresco, often needing repairs or susceptible to damage if the climate is not suitable. This is demonstrated by the challenges faced by Leonardo Da Vinci's 'The Last Supper', painted using fresco secco, which has struggled with adhesion and deterioration partly because of the environment. Overall, a dry climate helps ensure the longevity and stability of frescoes....