Chemistry Terpenoids & Liquid CO2 Extraction Technique Questions

Can you help me understand this Chemistry question? *What are terpenoids? What are the different types of terpenoids? What is D-limonene and to which type of terpenoids does it belong? *Describe chirality, polarimetry, optical rotation, enantiometric excess (ee). *Describe and discuss liquid CO2 extraction technique.*Discuss the different benefits of using liquid CO2 extraction as compared to the traditional steam distillation technique in isolating D-limonene from organge peels.