Which of these is an opinion? A. Earthships are the best environme ntally friendly homes. B. Reynolds used environme ntal principles in creating Earthships. C. Nearly half the materials in Earthships are natural or recycled. D. Windows let in sunlight and help heat Earthships.

## Step 1<br />An opinion is a belief or judgment that is not necessarily based on fact or knowledge. It is subjective and can vary from person to person. <br /><br />## Step 2<br />Option A, "Earthships are the best environmentally friendly homes," is an opinion because it is a judgment about Earthships that is not based on a fact or knowledge. It is subjective and can vary from person to person.<br /><br />## Step 3<br />Option B, "Reynolds used environmental principles in creating Earthships," is a fact. It is a statement that can be proven to be true or false. <br /><br />## Step 4<br />Option C, "Nearly half the materials in Earthships are natural or recycled," is also a fact. It is a statement that can be proven to be true or false. <br /><br />## Step 5<br />Option D, "Windows let in sunlight and help heat Earthships," is a fact. It is a statement that can be proven to be true or false.