Question

which sentence is punctuated correctly?

our class is learning, about plant cells and rezas class, is learning about animal cells.
our class, is learning about plant cells and rezas class, is learning about animal cells.
our class is learning about plant cells and rezas class is learning about animal cells.
our class is learning about plant cells, and rezas class is learning about animal cells.

Explanation:

Analyze the sentence structure

The sentence consists of two independent clauses:

1. "Our class is learning about plant cells"
2. "Reza's class is learning about animal cells"

Apply punctuation rules for compound sentences

When joining two independent clauses with a coordinating conjunction ("and"), a comma must be placed immediately before the coordinating conjunction. No other commas should separate the subjects ("Our class", "Reza's class") from their respective verbs ("is learning"), nor should they separate the verbs from their prepositional phrases ("about plant cells").

Evaluate the options

• Option 1: "Our class is learning, about plant cells and Reza's class, is learning about animal cells." (Incorrect: misplaced commas after "learning" and "class").
• Option 2: "Our class, is learning about plant cells and Reza's class, is learning about animal cells." (Incorrect: misplaced commas separating subjects from verbs).
• Option 3: "Our class is learning about plant cells and Reza's class is learning about animal cells." (Incorrect: missing the comma before the coordinating conjunction "and").
• Option 4: "Our class is learning about plant cells, and Reza's class is learning about animal cells." (Correct: correctly places a comma before the coordinating conjunction "and" to join two independent clauses).

Answer:

• (A) Our class is learning, about plant cells and Reza's class, is learning about animal cells.
• (B) Our class, is learning about plant cells and Reza's class, is learning about animal cells.
• (C) Our class is learning about plant cells and Reza's class is learning about animal cells.
• (D) Our class is learning about plant cells, and Reza's class is learning about animal cells. (Correct answer)