What is considered a living organisms?

anything that is living, like plants, animals, humans, etc

A living object that has an organized structure, can react to stimuli, reproduce, grow, adapt, and maintain homeostasis is referred to as an organism. Any animal, plant, fungus, protist, bacterium, or archaeon on Earth qualifies as an organism. Subcellular structures can also be used to categorize organisms.

correct answer is a. and d.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101