If the choices are physical change and chemical change, my answer is physical change, since physical change is just a change in appearance just like changing the size or looks of the area without taking something that is important to survival of the organisms; while chemical change is detrimental since it is the composition of chemicals that will be change which may not be suitable for the organisms that might lead to their death , I hope i got this right, i also hope that this helps you out, have an amazing day