I'm able to pass through my trees how can I prevent that?,I'm able to pass through my trees how do I fix it?

Questions & Answers
1

Please simplify it I’m new to Unity and don’t know much.,

2

There are many possible reasons but it’s not possible to say exactly why until you show us your code. However the most common problems are:

  • You are using transform.Translate to move. That takes no account of physics and collisions are handled by the physics engine. RigidBody.MovePosition will be a better method.
  • You have not attached colliders to the player or to the trees
  • You have not attached a RigidBody to your Player

I strongly recommend that you take a tutorial on moving characters. It’s really too big a topic for an answer here…