Adding Details to Narrative Writing

What is the BEST sentence to add to this paragraph?

Frog lives in a tank in my room. I feed him and take him outside each day. "I love to eat!" says Frog. Let me find some food. Frog can see a stick. He lops over. Hop. Hop. Hop. Then he eats a stick. Crunch. Crunch. Crunch. "Yum! That is good and makes a fine lunch!" says Frog. I smile at Frog and we go back inside.

What is the BEST sentence that could be added to this paragraph?

One day Mother Bear went to sleep next to the tree. She wakes up. She runs over to the cave. Her cub is not there. He is missing! She cannot find him. Mother Bear looks in the tree and sees her little cub. She is so happy.

What is the BEST sentence that could be added to this paragraph?

It is time for Mike's birthday party, but things are not done yet. "Do you have the cake?" asks Jack. "Yes, I have the cake,
says Ana. Ana brings the cake to the table. "Do you have the gifts?" asks Ana. "Yes, I have the gifts," says Jack. He stacks the gifts in a pile. "Happy birthday, Mike!" says Ana and Jack.