There is no centre of the expansion, the universe is simply expanding at all points. Observers in any galaxy see most of the other galaxies in the universe moving away from them. The only answer to the question "Where did the Big Bang happen?" is that it occured everywhere in the Universe.
Active transport can be defined as the process by which molecules are transported from a region where the concentration of the molecules is low to a region where the concentration of molecule is high across a selectively permeable membrane.
Here, the molecules are transported up or opposite to their concentration gradient and so the process requires the expenditure of energy in the form of ATP or Adenosine Triphosphate.
In the given question, it is said that the concentration of a polar molecule is high inside the cell initially.
But still with time the concentration of the polar molecule continues to increase inside the cell.
This is accompanied by the expenditure of energy in the form of ATP as concentration of ATP inside the cell is found to drop gradually.
Hence, the given hypothesis describes the process of an Active Transport.
Sodium will let that electron go as soon as it can, which is why it generally forms ionic compounds such as NaCl. When sodium atom loses an electron from its outer energy shell, it becomes Na+ ion. D is the answer
Concentrated targeting strategy may also called niches targeting. This is a situation whereby an organization /firm directs all its energy or efforts on a single market part.
Penguin Catering Services used concentrated targeting marketing because it focus/limit its target to only event at resorts in its geographical region.
