How to change background color in photoshop?

Use the paint bucket tool.

Explanation:

select the background layer, select your color, and use the paint bucket tool. Make sure to unlock the background layer before using the paint bucket tool otherwise it wont work.

i would say the answer is b. zigzag lines of the leaves. i believe this is the answer because zigzag lines go in different direction while the other options like: the vertical lines of the trees, the dotted lines on the road, and the curved lines of the park benches go in one direction.

answer/// priests singing psalms and the congregation singing responses;