B. I gazed at the bright blue sky and the trees filled with lush green foliage.
Sensory details are descriptions that apply to the five sense (sight, sound, touch, taste, smell). In Option B, the sense that is appealed to is the sense of sight. The sky is described as a bright blue and the trees are described as being lush, full of thick leaves. These details help to put a picture in the reader's mind. The other options sometimes give detailed information but they are about the characters inner thoughts. These are not sensory details.