Lots of plants need animals to spread their seeds. Some seeds are inside fruit. Animals and birds eat the food. Then the seeds pass right through their digestive systems and end up on the ground again, somewhere else. Some seeds catch n animals fur. They get spread around as the animals move from place to place.
Put on some woolly socks and see how many seeds you can pick up.
You will need: fuzzy socks, a magnifying glass, a place to walk and a day when weeds have ripe seeds in the fall or the spring.
Pull the socks on OVER your shoes. Go for a walk through the weeds in a field or park. Take off the socks see what seeds you picked up.