---
id: 66330fc6d2e3c38e148c8789
title: Task 30
challengeType: 22
dashedName: task-30
lang: en-US
---

<!-- (Audio) Sarah: Comments explain that function's purpose. -->

# --description--

You've already learned about demonstrative pronouns like `this`, `that`, `these` and `those`. Remember to use them to refer to specific things or people, considering their proximity in time or space.

The genitive case, often indicated by an apostrophe and `s` (like `function's`), is used to show possession or belonging, typically for people or objects. It tells people that something belongs to or is a part of something else.

The word `purpose` refers to the reason why something is done or used, or why something exists. For example, `The purpose of a clock is to tell time.`

# --fillInTheBlank--

## --sentence--

`Comments explain BLANK BLANK BLANK.`

## --blanks--

`that`

### --feedback--

This pronoun is used to point out a specific thing being discussed or referred to in the context.

---

`function's`

### --feedback--

This possessive form shows that something belongs to the function.

---

`purpose`

### --feedback--

It refers to the reason or goal behind something. In this context, it describes what the function is intended to do or achieve, as explained by the comments in the code.

# --scene--

```json
{
  "setup": {
    "background": "company2-roof.png",
    "characters": [
      {
        "character": "Sarah",
        "position": {
          "x": 50,
          "y": 0,
          "z": 1.4
        },
        "opacity": 0
      }
    ],
    "audio": {
      "filename": "5.2-2.mp3",
      "startTime": 1,
      "startTimestamp": 18.32,
      "finishTimestamp": 20.42
    }
  },
  "commands": [
    {
      "character": "Sarah",
      "opacity": 1,
      "startTime": 0
    },
    {
      "character": "Sarah",
      "startTime": 1,
      "finishTime": 3.1,
      "dialogue": {
        "text": "Comments explain that function's purpose.",
        "align": "center"
      }
    },
    {
      "character": "Sarah",
      "opacity": 0,
      "startTime": 3.6
    }
  ]
}
```
