how were seeds for plants and flowers made ?

Question: how were seeds for plants and flowers made ?
- Keywords:
  flower,
  plant,
  seed
Asked by mallinkerry:) to Reka on 17 Nov 2016.
- Reka Nagy answered on 17 Nov 2016:
  
  They were made by other plants and flowers! Seeds grow inside plants and they get spread around by animals or the wind and grow into a new plant!

Question: how were seeds for plants and flowers made ?