Convention on Biological Diversity, the major, worldwide threats to biodiversity are population growth and consumption, climate change and global warming, conversion and urbanization, invasive species, over-exploitation of natural resources and environmental a. True
b. False

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !

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.