all 4 que​

Ans 1) Liberalisation refers to removal of various barriers and restriction on trade. The following are the benefits of liberalisation:

• It helps in improving the production and investment in the economy. 
• Increased competition pushes the efficiency of the domestic producers. 
• Consumers benefit from the increased availability of goods and services. 

Ans 2) Please follow the below mentioned link for answer to a similar query.
https://www.meritnation.com/ask-answer/question/5-merits-and-5-demerits-of-privatisation/unit-ii-liberalisation-privatisation-and-globalisation-an-ap/8150773 Ans 4) Follow the below mentioned link for answer to a similar query:
https://www.meritnation.com/ask-answer/question/keeping-in-view-your-locality-describe-any-four-strategies/unit-iii-environment-and-sustainable-development/6320212