Why do I get jealous over a girl even though I don't want to be with her at all?

 There are a few possible reasons why you have carrots growing all over your yard:

Volunteer carrots: Carrots are biennial plants, meaning they take two years to complete their life cycle. In the first year, the plant grows roots, leaves, and a rosette. In the second year, the plant flowers and produces seeds. If you had carrot plants in your garden last year, they may have gone to seed and dispersed their seeds naturally. These seeds can then sprout and grow into new carrot plants, even if you didn't plant them this year.

Animals: Animals such as birds, rodents, and insects can also spread carrot seeds. For example, a bird may eat a carrot seed and then drop it in your yard as it flies away. Once the seed hits the ground, it can germinate and grow into a new carrot plant.

Wind and water: Wind and water can also spread carrot seeds. For example, a strong gust of wind could blow a carrot seed from your garden to another part of your yard. Or, heavy rain could wash carrot seeds from your garden to other areas of your property.

If you don't want carrots growing all over your yard, you can try to remove the volunteer plants as soon as you see them. You can also try to prevent animals from spreading carrot seeds by covering your garden with netting or by using bird feeders and other deterrents. And you can try to prevent wind and water from spreading carrot seeds by planting a windbreak around your garden and by building raised beds.

However, it's important to note that it's almost impossible to completely prevent carrots from growing in your yard. Carrots are very hardy plants, and their seeds can survive for many years. So, even if you take all of the necessary precautions, you may still find a few volunteer carrot plants popping up in your yard from time to time.