What is the principle of microsublimation of identification of crude drugs?​

Explanation:

Crude drugs are vegetable or animal drugs[clarification needed] that contain natural substances that have undergone only the processes of collection and drying[dubious – discuss]. The term natural substances refers to those substances found in nature that have not had man-made changes made in their molecular structure. They are used as medicine for human being and animal, internally and externally for curing disease, e.g., Senna and Cinchona.

A crude drug is any naturally occurring, unrefined substance derived from organic or inorganic sources such as plant, animal, bacteria, organs or whole organisms intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in humans or other animals.

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

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satellites are frequently used to make observations of the orbit on earth