The correct answer is - C) Rainforest.
The Southwestern part of Asia, or as often referred to as the Middle East, is a very arid region. Most of it is dominated by deserts, semi-deserts, steppes, and the greenery is extremely rare and can be spot only in small pockets of the area, like in the mountains of Lebanon. The precipitation is very low, the temperatures in general are very high, and in big parts of the region there isn't even a single stream or river that has a water flow throughout the whole year, like the Arabian Peninsula for example. There isn't conditions for rainforest to exist in here, as it is too dry, and the flora from the rainforests require a lot of water, thus constant and very high precipitation, which in this region is nowhere to be found.