I think it is but i downt know
There is no defined limit on the capacity of the brain. The brain's capacity cannot be measured as it is not subject to a defined "space" where the memory is kept, and it is not such that each neuron is responsible for a single memory. The brain has complex mechanisms of memory storage, that even improve if trained.
Death rate is lower than birth rate, and immigration equals emigration would lead to an increasing population.
Option D is the correct answer
What happens is the rearrangement of particles of the gold in a physical change