Guidance comes in the form of a string grid that is stretched across a planting bed, which divides it into one-foot squares. Kids get advice about how many seeds or seedlings to put in each square and how deep to plant them. Volunteers show kids pictures of how the full-grown plants will look, so they understand how much room each plant needs.
The main idea of this paragraph is ________.
A、Showing Kids the Pictures
B、How to Plant Seeds or Seedlings
C、How to Measure the Land
D、Teach Kids to build a Sunflower House