TASK DEFINITION: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
PROBLEM: A continent is one of several very large landmasses of the world. Generally identified by convention rather than any strict criteria, up to seven regions are commonly regarded as continents. Ordered from largest in size to smallest, they are: Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

SOLUTION: where does africa rank among the seven continents in size

PROBLEM: Japan's service sector accounts for about three-quarters of its total economic output. Banking, insurance, real estate, retailing, transportation, and telecommunications are all major industries such as Mitsubishi UFJ, Mizuho, NTT, TEPCO, Nomura, Mitsubishi Estate, ÆON, Mitsui Sumitomo, Softbank, JR East, Seven & I, KDDI and Japan Airlines counting as one of the largest companies in the world. Four of the five most circulated newspapers in the world are Japanese newspapers. The Koizumi government set Japan Post, one of the country's largest providers of savings and insurance services for privatization by 2015. The six major keiretsus are the Mitsubishi, Sumitomo, Fuyo, Mitsui, Dai-Ichi Kangyo and Sanwa Groups. Japan is home to 251 companies from the Forbes Global 2000 or 12.55% (as of 2013).

SOLUTION: what is the main source of income in japan

PROBLEM: A sporangium (pl., sporangia) (modern Latin, from Greek σπόρος (sporos)' spore' + αγγείον (angeion)' vessel') is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically distinct haploid spores.

SOLUTION:
where are sporangia found and what is their function