Read the passage. Then answer the question that follows.

Metamorphosis

Metamorphosis is certainly a strange word, but its meaning is very common. Insects and amphibians commonly complete metamorphosis. This means that they go change from an egg into something different.

Some insects and amphibians take four steps to complete their metamorphosis. Butterflies are common to think of when someone mentions complete metamorphosis, the four steps to reaching adult form. Here, the process begins as an egg. This is called the unborn stage. It lasts about 3 to 4 days. The second stage is the larva stage. This stage of metamorphosis usually lasts 10 to 14 days. During this time, the young will do most of their feeding. The third stage is called the pupa stage. This stage lasts about as long as the larva stage. The final stage is when the insect or amphibian reaches their adult form.

Slightly different than the process butterflies follow is incomplete metamorphosis. The biggest difference is that this type of metamorphosis is one step shorter and is completed in three steps. Dragonflies, cockroaches, and grasshoppers go through an incomplete metamorphosis. They start as an egg during the unborn stage. On the fourth or fifth day, they enter the larva stage. During this stage, the nymph will look like a miniature version of its adult form. Think about a grasshopper. If you see one in your yard during the larva stage, you will already know that it is a grasshopper. It may be small because it is in the larva stage and is only a nymph, but soon it will enter stage three of incomplete metamorphosis. Stage three is when the final breeding stage is reached.

Certainly, metamorphosis is very important to the insects and amphibians that we see in our daily lives. The process of complete and incomplete metamorphosis that happens allows our backyard friends to develop into their adult forms.

Which of the following statements is an OPINION that the author could have used to support his passage?