You are asked to prepare materials for a school environmental week focused on clean energy. The packet should include a short composition and focused answers to help students understand the topic clearly.

a. Write a 200-word composition on "Renewable Energy and Sustainable Living".

b. List three major advantages of adopting renewable energy, with one-sentence explanations for each.

c. Identify three key challenges in shifting from fossil fuels to renewables, with brief explanations.

d. Recommend five practical actions an individual student can take to support sustainable living and renewable energy adoption.