“Salubrious” means ‘health-giving; healthy’.
Option D is the correct answer because “healthful” means full of health, hence it is the correct meaning for the given word.
Option A is incorrect because “cold” means of a relatively low temperature, which is not the correct meaning of the given word.
Option B is incorrect because “temperate” means relating to or denoting a region or climate characterized by mild temperatures, which is incorrect as it is not the meaning of the given word.
Option C is incorrect because “warm” means a comfortably high temperature, hence it is incorrect.