The correct answer is $\boxed{\text{(B)}}$.
The determinant of a 3×3 matrix can be computed using the following formula:
$$\det \begin{bmatrix}
a & b & c \\
d & e & f \\
g & h & i
\end{bmatrix} = (aei – bg – ch) + (bf – ce)d + (cd – af)g$$
In this case, we have the matrix:
$$\begin{bmatrix}
1 & x & x^2 \\
1 & y & y^2 \\
1 & z & z^2
\end{bmatrix}$$
Substituting into the formula, we get:
$$\det \begin{bmatrix}
1 & x & x^2 \\
1 & y & y^2 \\
1 & z & z^2
\end{bmatrix} = (1)(z^2 – y^2) – (x)(y^2 – z^2) + (x)(z^2 – x^2)$$
Simplifying, we get:
$$\det \begin{bmatrix}
1 & x & x^2 \\
1 & y & y^2 \\
1 & z & z^2
\end{bmatrix} = x^2 – y^2 – z^2$$
This is the determinant of the matrix in option $\boxed{\text{(B)}}$.
The determinants of the matrices in options $\boxed{\text{(A)}}$, $\boxed{\text{(C)}}$, and $\boxed{\text{(D)}}$ are all equal to $0$. This is because they all have a row or column of identical elements.
In option $\boxed{\text{(A)}}$, the first row is all $1$s. This means that the determinant of the matrix is equal to $1$ times the determinant of the matrix that is left after we remove the first row and column. The determinant of the remaining matrix is equal to $0$, since it is a 2×2 matrix with a row of identical elements. Therefore, the determinant of the matrix in option $\boxed{\text{(A)}}$ is also equal to $0$.
In option $\boxed{\text{(C)}}$, the second column is all $0$s. This means that the determinant of the matrix is equal to $0$ times the determinant of the matrix that is left after we remove the second column and row. The determinant of the remaining matrix is equal to $0$, since it is a 2×2 matrix with a column of identical elements. Therefore, the determinant of the matrix in option $\boxed{\text{(C)}}$ is also equal to $0$.
In option $\boxed{\text{(D)}}$, the third row is all $1$s. This means that the determinant of the matrix is equal to $1$ times the determinant of the matrix that is left after we remove the third row and column. The determinant of the remaining matrix is equal to $0$, since it is a 2×2 matrix with a row of identical elements. Therefore, the determinant of the matrix in option $\boxed{\text{(D)}}$ is also equal to $0$.