were the first organisms in the history of life on earth that could use solar energy to build organic compounds from carbon dioxide and, in the process, break down water molecules to release oxygen.

photosynthetic bacteria

Explanation:

These were probably the first organisms to use the energy from the sun to build organic compounds. This photosynthetic bacteria is the blue-green alga also referred to as cyanobacteria. This organism brought about the evolution of photosynthesis and began exhaling oxygen.

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.