Concept:Coffee plants prefer cool, moderate climates and well-drained slopes, which are typical of highland regions.Explanation:Coffea spp. grows well at higher elevations because temperatures stay mild and rainfall is evenly spread.Lowlands become too hot and hinder healthy coffee development.Mangrove environments are waterlogged and salty, making them unsuitable.Rain forests are overly humid and dense, but highland slopes provide the best commercial growing conditions.Answer:B. on highlands