Problem: Major reductions in the cost of lighting occurred with the discovery of whale oil and kerosene. Gas lighting was economical enough to power street lights in major cities starting in the early 1800s, and was also used in some commercial buildings and in the homes of wealthy people. The gas mantle boosted the luminosity of utility lighting and of kerosene lanterns. The next major drop in price came about with the incandescent light bulb powered by electricity.
What type of lighting was powered by electricity?
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Answer: incandescent light

Problem: Animals are also involved in the distribution of seeds. Fruit, which is formed by the enlargement of flower parts, is frequently a seed-dispersal tool that attracts animals to eat or otherwise disturb it, incidentally scattering the seeds it contains (see frugivory). Although many such mutualistic relationships remain too fragile to survive competition and to spread widely, flowering proved to be an unusually effective means of reproduction, spreading (whatever its origin) to become the dominant form of land plant life.
What turned out to be unusually effective for plants to reproduce?
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Answer: flowering

Problem: The city is home or birthplace to a number of contemporary musicians such as R'n'B singer Craig David, Coldplay drummer Will Champion, former Holloways singer Rob Skipper as well as 1980s popstar Howard Jones. Several rock bands were formed in Southampton, including Band of Skulls, The Delays, Bury Tomorrow, Heart in Hand, Thomas Tantrum (disbanded in 2011) and Kids Can't Fly (disbanded in 2014). James Zabiela, a highly regarded and recognised name in dance music, is also from Southampton.
What genre of music is James Zabiela known for?
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Answer:
dance