Ecosystems are exposed to change in the environment which can effect the composition of the ecosystem. These changes are called
O disturbances
O effects
O hardships
O acts

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

mark as brainlest

gokuson

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

i think its both a and b