They all reproduce by spreading seeds, cacti spreads its seeds in the thorns, trees spread seeds by acorns and other things that is just my example. Grass spread thier seeds by the seeds inside of the strand of grass. when the grass gets mowed and blown away or when it dies or also when people re plant they get rid of the dead grass and put in some healthy growing seed.
I hope this helps.
And if this is correct do mind marking me as brainliest.