Coordinate Conjunction & Parallel Contruction

1. Coordinate Conjunction
Co-ordinate conjunctions join similar words, phrases or clauses to each other (i.e., to join an adjective to an adjective or a noun to a noun).  The most common co-ordinate conjunctions are: and, but, or, for, nor, so and yet.
The conjunctions and, but and or are the most common by far.

Examples:
The waiters served sandwiches and cakes. (joins two nouns)
He is a small but aggressive dog. (joins two adjectives)
The manager or his secretary will be with you in a moment. (joins two nouns)
He typed the letter quickly but accurately. (joins two adverbs)

In the examples above, the conjunctions all join words.  As a general rule, when a conjunction joins two words, there is no need to precede it with a comma.  However, when it joins two clauses, it is usual to place a comma before the conjunction.

Examples:
The applicant must be able to sing and dance. (no comma)
The applicant must be able to sing, and she must be able to dance. (joins two clauses - comma required)
 
Interactive example:

Pat and I slept, but Julie stayed awake the whole way.

Referensi : in here

2. Parallel Construction
Parallel construction means using the same pattern of words to show that two or more ideas have the same level of importance. This can happen at the word, phrase, or clause level. The usual way to join parallel construction is with the use of coordinating conjunctions such as "and" or "or."

Words and Phrases

With the -ing form (gerund) of words:

Parallel:

Mary likes hiking, swimming, and bicycling.

With infinitive phrases:

Parallel:

Mary likes to hike, to swim, and to ride a bicycle.
OR
Mary likes to hike, swim, and ride a bicycle.

(Note: You can use "to" before all the verbs in a sentence or only before the first one.)

Referensi : In here