Answer:
Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field.
Gold, frankincense and myrrh
Answer:
I think it is Russia, but correct me if I'm wrong!
Answer: B) A planned unit development
Explanation: The planned development of the unit is a planned and purposeful use of land and space where densely populated residential units are being built with all the necessary amenities and features. It is also a regulatory process for the use of space and land, as it regulates the optimal use of the said space and land for different purposes, from housing, shopping malls, parks, children's playgrounds, sports and spa centres, etc. Such blocks of flats and all the aforementioned dedicated contents are also cost-effective, since the use of that space and land on which densely populated residential units will be erected and will generate good income is optimised.
