Hello I want to report agrass and a tree without a trunk floating on a lake in the prairies and many crosses on the floor of my world

Hello I want to report an error in the generation of one of my worlds, the error is as follows: grass and a tree without a trunk floating on a lake in the prairies and many crosses on the floor of my world. I would like you to solve it and please do not change the model of the horses a lot since for the creators of texture packages it will be very difficult to change models. Thanks For Everything A Greeting and Good Work !!!!