D. single- and simple multi-celled organisms
Although more complex animals like invertebrates and multi-celled organisms began to appear, it was very late compared to the original, simpler organisms for which the Precambrian time is characterized by.
Answer:
I think d. more developed
The population is not distributed uniformly throughout Canada's territory. The vast majority of people who make up the population of Canada live in the southern part of the country, near the American border, leaving the northern areas largely uninhabited.
The crust moves across the mantle
