Answer: c. shrub
Explanation:
Creosote bush is a shrub. Its botanical name is Larrea tridentate. It is found everywhere in Chihuahuan Desert in North America. It is unique set of adaptations to live in desert. Since desert has very less rainfall, Creosote bush does maximum photosynthesis in the morning when moisture in the air (humidity) is highest. It closes its stomata when sunlight is high and air is dry.
