Here are the two different code snippets.
The code with {\it{}} seems to correctly italicize only the braced text. When I use \it{} it italicizes the remainder of the document. Why is that?
{\it{}} with code and example
\item Determine whether the following is {\it{always true, sometimes true}}, or {\it{never true}}. Explain.
\begin{enumerate}
\item $\vec{a}(t)$ is perpendicular to $\vec{N}(t)$.
\item $\vec{a}(t)$ is perpendicular to $\vec{r}(t)$.
\item $\vec{v}(t)$ is perpendicular to $\vec{r}(t)$.
\end{enumerate}
Outputs
\it{} with code and example...
\item Determine whether the following is \it{always true, sometimes true}, or \it{never true}. Explain.
\begin{enumerate}
\item $\vec{a}(t)$ is perpendicular to $\vec{N}(t)$.
\item $\vec{a}(t)$ is perpendicular to $\vec{r}(t)$.
\item $\vec{v}(t)$ is perpendicular to $\vec{r}(t)$.
\end{enumerate}
my favorite text.
Outputs
\itis not valid LaTeX (since many years, as someone probably will tell you). Use{\itshape ... }or\textit{ ... }– mickep Dec 06 '22 at 18:02\textitor\it,\bfseriesor\bf, etc. Will two-letter font style commands (\bf,\it, …) ever be resurrected in LaTeX? – Werner Dec 06 '22 at 18:10\emph{word}– musarithmia Dec 06 '22 at 18:34