An ecologist is carrying out a population study on songbirds in your area. Over a three-year period, the songbirds' population increases. In that time, the population's birthrate was lower than its death rate.
Explain how it can be possible for the population size to grow.

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The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass