Hey there! :D
Keep in mind with this, that outside forces (or factors) are considered part of the influence of the environment. While something out of environmental control, more about genetics and make-up, is about heredity. So, in this case, heredity would indicate the features of the plant. Yellow flowers and tall stem. This is part of the make-up of the plant. The environment traits would be the wilted part of the flower. This is because of an outside force, it doesn't have enough water. This is determined by the environment.
I hope this helps!
~kaikers
