Explain why it was important to keep on set of seedling in the light

Among all the factors necessary for the growth of a plant, light comes first. Without it, we will hardly grow any plant, especially vegetables that need much more energy to develop fruits. It is precisely the lack of natural lighting that is one of the most common problems urban gardeners encounter when growing vegetables.

Explanation:

The lack of light cannot be solved naturally, but by using artificial lighting. By using artificial lighting we can completely eliminate the problem of lack of natural light, but also allow some flexibility when positioning seedling. Depending on which climate they come from, edible plants can be classified into two groups - sun plants and shade plants.

they are known to reach a speed of 21 miles per hour

i'd say that the moon rock is about 2.2 billion years old.