Students draw the missing half of each animal to explore external features of living things.

The task in the image is to complete the drawings of living things by drawing the other half of each animal. This exercise helps children understand symmetry and external features of living organisms. Below is a step-by-step explanation of how to solve this problem:

---

Step 1: Understand the Task

The goal is to draw the missing half of each animal so that the entire animal looks symmetrical. Symmetry means that one side of the animal mirrors the other side.

---

Step 2: Analyze Each Animal

Let's look at each animal individually:

#### Top Left: Butterfly
- The butterfly is already drawn with its left wing and body.
- To complete it, you need to draw the right wing, which should mirror the left wing.
- Ensure the patterns on both wings match (e.g., spots or stripes).

#### Top Right: Owl
- The owl is drawn with its head and part of its body.
- To complete it, draw the other eye, beak, and the rest of the body (feathers and legs).
- Make sure the features are symmetrical (e.g., the eyes should be the same size and shape).

#### Bottom Left: Zebra
- The zebra is shown from the front, with its left side visible.
- To complete it, draw the right side of the zebra, including the stripes, ears, and legs.
- Ensure the stripes are mirrored accurately.

#### Bottom Right: Elephant
- The elephant is shown from the side, with its trunk and part of its body visible.
- To complete it, draw the other ear, tusks, and the rest of the body.
- Make sure the features are proportionate and symmetrical.

---

Step 3: Draw the Missing Halves

Using the guidelines above, here’s how you can complete each drawing:

#### Butterfly
- Draw the right wing to match the left wing.
- Add any additional details like antennae if needed.

#### Owl
- Draw the other eye, beak, and feathers.
- Ensure the facial features are symmetrical.

#### Zebra
- Draw the right side of the zebra, including the stripes, ears, and legs.
- Make sure the stripes are mirrored accurately.

#### Elephant
- Draw the other ear, tusks, and the rest of the body.
- Ensure the trunk and ears are proportionate.

---

Final Answer

Here is a description of the completed drawings:

1. Butterfly: Draw the right wing to mirror the left wing, ensuring the patterns (spots or stripes) are symmetrical.
2. Owl: Draw the other eye, beak, and the rest of the body, ensuring the facial features are symmetrical.
3. Zebra: Draw the right side of the zebra, including the stripes, ears, and legs, ensuring the stripes are mirrored accurately.
4. Elephant: Draw the other ear, tusks, and the rest of the body, ensuring the trunk and ears are proportionate.

If you were to draw these, the final result would show fully symmetrical animals.

---

Final Answer Box:
\boxed{\text{Draw the missing halves of each animal to make them symmetrical.}}