Which text structure did the author use in the following paragraph?

Icebergs-giant blocks of ice that float in the sea-come in many shapes, sizes and colors. Some are deep blue or green. Some look like floating sculptures. Old icebergs that have been worn down by weather sometimes look like pillars of ice.

Which text structure did the author use in the following paragraph?

In many parts of the world, women and children have to walk miles to fill buckets of water from streams and lakes. Often, this water is contaminated with diseases and dirt. Each year in Africa hundreds and thousands of children die from diseases they got from drinking dirty water. Ryan Hreljac decided he had to do something about this. He bagged to raise money to build a well for an African village. This gives people in the village a clean, close water supply.

Which text structure did the author use in the following paragraph?

During the storm, it rained seven inches in four hours. Because the underpass was flooded, and the cars could not get to the school. Many parents were late to pick up the children.