What discovery allowed gardeners to grow orchids in greenhouses? a. orchids must grow in windy areas c. orchids will only produce seeds during a monsoon moon b. orchid seeds will only germinate in the presence of a special fungus d. orchids do not breed sexually need answer asap

The correct answer is B. Orchids seeds must germinate in the presence of fungus. 

The discovery which allowed gardeners to grow orchids in the greenhouse is because the orchids must grow in windy areas. The orchids are referred to as an orchid family because it is a widespread family of flowery plants which has blooms which are fragrant and colorful.
They are among the largest families of flowering plants. Orchids can be distinguished from other plants because they share derived characteristics. For example bilateral symmetry of flower, they have fused carpels and stamens, and are very extremely small seeds.
Orchids are perennial herbs and they lack permanent woody structure. They can grow following two patterns which are sympodial and monopodial.

C. gemstones they are the only non metallic mineral from the list.