A、There is a competition among people in gardening. B、The meats and dairy products are not healthy. C、More and more people want

Maybe you’d like to have a vegetable garden, but you live in a room, an apartment, a townhouse or a mobile home, and you think there is no place at all for such activity.(29)But if you have a doorstep, a balcony or even just a windowsill, you can have your own mini-garden.
    Mini-gardening with vegetables, fruit trees and herbs can be fascinating fun, and you can mix or match all vegetables or vegetables and flowers. You can grow them in greenhouses, under fluorescent lights, or in a sunny window.
    Perhaps now, with the prices of fresh vegetables competing with those of meats and dairy products, this is more than ever an important aspect of indoor gardening.(30)But entirely aside from the economic dividends, there is the pleasure of enjoying a truly fresh product, one you grew yourself from plant to plate.
    Vegetable plants grow better in full sunlight than in the shade. Some vegetables need more light than others. Leafy vegetables can stand more shade than root vegetables. Root vegetables can stand more shade than vegetable fruit plants which do very poorly in the shade.(31)Plant your vegetable fruit plants where they will get the most sun, and your leafy vegetables and root vegetables in the shadier areas.
29. Q: Compared with traditional garden, what is the advantage of mini-garden?
30. Q: Why would people choose to garden for themselves?
31. Q: What does the author tell us about the growing of different vegetables?