Here are some concepts: habitat, niche, organism

What is a sentence about these concepts?

Sentence is below.
niche the special role an organism plays within a habitat .

Here are some concepts: duck, flock, food

What is a sentence about these concepts?

Sentence is below.
flock of mallard ducks catching the food .

Here are some concepts: bottom, change, direction, letter, middle

What is a sentence about these concepts?

Sentence is below.
The direction of the scrolling letters change from bottom to top and now they're in the middle.

Here are some concepts: conflict, end, tank

What is a sentence about these concepts?
Sentence is below.
an abandoned tank after military conflict ends a city