I. Define "model organism.

It's a non human species that can be studied to bring biological phenomena, they are studied. They are use for inventions of different materials and they can give answerds to a tricky question. It's stored on laboratory or experiment room.

Their body was examined for various reasons that help scientist discovere many things in this world

A model organism is a non human species that is extensively studied to understand particular biological phenomena, with the expectation that dicoveries made in the model organism will provide insight into the working of other organisms.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.