The image illustrates a building with a green roof – a roof that is covered in living vegetation. Green roofs help to solve one part of a complex problem. A
green roof increases the amount of carbon dioxide taken up in an urban area
and reduces the building's energy costs for heating and cooling.
Which problem are green roofs most likely helping to solve?
A. Urban worker safety
B. Environmental impact of paved surfaces
C. Reliability of power supply
O D. Public health issues

C

Explanation:

if green roofs are reducing the cost of heating and cooling that means with the green vegetation the power supply will be higher and more reliable

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.