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The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.

A computer can perform inputting, processing and cotrolling but it can't perform understanding as it is has no brain. It can't earn from its previous experiances.

A person that believes completely in fate is a fatalist, or sometimes predestinarianist or determinist.

Dull means not sharp, not shining, not bright, ...

Hence, the given words are all that means the opposite of dull.

Words to describe a beautiful woman are :: appealing, fair, charming, fascinating, dazzling, fetching, angelic, fine, delicate, delightful, divine, beauteous, ...

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.