Read the following article and mark the letter A, B, C, or D to indicate the correct option that best fits each of the numbered blanks from 1 to 6.

The Rise of Rooftop Gardens
Rooftop gardens offer a creative solution (1) _______ urban challenges like pollution and limited green spaces. These innovative spaces transform concrete rooftops into lush havens, providing fresh air and vibrant greenery. With a(n) (2) _______ , rooftop gardens can thrive, benefiting both people and the environment.
These gardens, reducing heat absorption, help lower energy costs for buildings. Additionally, they improve air quality and provide habitats for birds and (3) _______ species. Many cities have embraced rooftop gardening, inspiring others to (4) _______ similar projects.
Residents often grow fresh vegetables and herbs, reducing their (5) _______ on store-bought produce. This sustainable approach supports local biodiversity and promotes healthier living. By utilising unused rooftops, these gardens create a practical and aesthetic solution that enhances urban life while addressing environmental (6) _______ .