To answer this question, we need to identify the word that does not belong with the others based on a common characteristic or category.
Option A) triangle - This option is incorrect because it is a two-dimensional shape, just like the other options.
Option B) circle - This option is correct because it is the only option that is not a two-dimensional shape. A circle is a flat, round shape, while the other options are all three-dimensional shapes.
Option C) oval - This option is incorrect because it is a two-dimensional shape, just like the other options.
Option D) sphere - This option is incorrect because it is a three-dimensional shape, just like the other options.
The correct answer is B) circle. This option does not belong with the others because it is a two-dimensional shape, while the others are three-dimensional shapes.