The Arrangement of Paragraph

The arrangement of sentence after a topic sentence depends opn paragraph function. The pattern can not simply go in any direction the writer wants it to go. Instead, the topic sentence determines the pattern. It sets up the reader's expectations, and those expectations must be met.

1. Subordination
Some paragraphs focus on one idea and develop it into more and more spesific terms. The follo0wing is typical of this form.
Lead acid batteries, which can be used to power electric cars, are simple comnstructed. Topic sentence, the rest of the paragraph must describe the constructions., that kinds of battery is a box, ususally an oblong one of less than one cubic foot in volume, made of plastic or some other synthetic material. Inside the box are "plates" or flat sheet of lead, which are surrounded by acid. The number of plates determines the strength of the battery. Each plate is made of lead because of the cheapness and stability of the metal.

2. Coordination
Obviously, you can't write subordinated paragraph all the time; sometimes you will write paragraph which simply list a series of ideas about the same level of abstraction. The following is typical of this form:
The advantages of the electric car make it the most desirable kind of vehicle for urban transportation in the future.
Since electric motors are quiet by gas engine standards, noise pollution will be reduced.
Electric Motors produce to toxic gases which cannot be cleaned up; the ozone they emit can be controlled.
Because the limitations of battery power, electric cars will be small, allowing more room in narrow city streets
Finally, The energy shortage will be drastically improved , since electruic motors are on the average twice as efficient as internal combustion engines.