Read Each Sentence and Choose the Most Appropriate Tone Word

Short Answer

Read each sentence and choose the most appropriate tone word from the word bank.
$$\begin{array} { l l l l l } \text { Regretful } & \text { Disapproving } & \text { Nostalgic } & \text { Shocked } & \text { Optimistic } \\\text { Sarcastic } & \text { Apathetic } & \text { Excited } & \text { Urgent } & \text { Frustrated }\end{array}$$
-"This morning I was sitting in the kitchen watching the birds outside the kitchen window and I couldn't help but think of the time we went bird watching."Tone:_______________