Emphasize means giving special importance or worth giving attention to in speaking or writing.

Here in the options, Accentuate is most nearly means Emphasize.

Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population, then such factor is called Density Independent Factor. It is things that the organisms have no control over.

Here in the given options, food shortage and disease are factors that are dependent on the number of population but Floods have no dependency.

Some examples of density independent factors are :: Earth quake, fires, volcanic eruptions, floods, and  all natural calamities.

Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.

The Berlin Conference of 1884–85 was a meeting between European nations to create rules on how to peacefully divide Africa among them for colonization. The conference was convened by Portugal but led by Otto von Bismarck, chancellor of the newly united Germany. 

The 14 countries that attended included all the major European powers, as well as Russia, Turkey and the United States. The conference began with a dispute about the Congo River basin.Slavery was forbidden throughout Africa. The attendees agreed upon a principle of effective occupation by which rights over African colonies would be assessed.

Before the conference, about 80 percent of African territory was still in local hands. By 1902, European powers controlled 90 percent of Africa.

There are two IP address assigned to each device on a Wi-Fi network.

An Internal (Private) and an External (Public) IP address.

Internal IP address is used for communication between Your computer and a smartphone or whatever devices that are connected to that Wifi network. This is unique for each. If they are same the system cannot differentiate between each device.

While, the External IP address is that visible to the the internet - the websites, the internet connected Apps so on. By default, Routers with NAT (all routers today have it) assign same Public IP address to all devices under its network.

tRNA abbreviated as A transfer RNA is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.

She don't speak either German or French is the correct sentence in English.