Can someone help me with this question

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?

Humans have to eat food to get the nutrients that keep us alive, but plants use the sun to power photosynthesis