Which one is it I am confused A, B,C or D

I think option B is right answer

B) Image 1 -> Image 3 -> Image 4 -> Image 2

Explanation:

The pictures of the ecosystems are needed to be put into the simplest -> complex order.

Image 1 could be the simplest as it only has one organism.

Image 3 would be the next simplest as it has only a group of the same organism.

Image 4 would come next as it has aqua life and surroundings but the same fishes!

Image 2 would be the most complex, as it has various biodiversity and surroundings!

The order would go as Image 1 -> Image 3 -> Image 4 -> Image 2.

the answer is c) an oak tree

uh two lol