Read the following dialogue and answer the question.

Lia: Hey, Tom!

Tom: Hey Lia, what's happening? You look so confused.

Lia: I don't understand what the teacher said in biology class.

Tom: Let me help you. Which one don't you understand?

Lia: This one. It is about ecosystem.

Tom: Oh, in an ecosystem there is living organisms such as animals, plants, and non living components such as mineral, air, and water. Have you got it?

Lia: Yeah, but I'm still not sure about it. Can you explain it to me?

Tom: Yeah sure. Should we study about it in our school library?

Lia: Sure, let's go now!

Tom: Okay. 

What did Lia look?