How the drugs release their active agents in specific dosage forms is called drug delivery system. It refers to any scientific method, technologies, approaches, formulations and systems for transporting a pharmaceutical compound through capsules or any medication device in the body.
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Answer: Earth's rotation
Explanation: As the earth rotates around its own axis and revolves around the Sun different parts of the earth get different times and different seasons when it's winter in the northern hemisphere it's summer in the southern hemisphere