Sentence Analysis - lake, bright turquoise

Which of these are incorrect and why

a. The place was beautiful, the lake bright turquoise.

b. The place was beautiful, the lake bright turquoise in colour.

c. The place was beautiful, the lake bright turquoise, the forest a deep green.

d. The boy was stumbling, his eyes half closed, his head looking down at his feet .

d. There was a lake, bright turquoise.

e. There was a lake, bright turquoise in colour.

f. There was a lake, which was bright turquoise.

Thanks a lot