Explanation:

The correct answer is option 'B' - View buttons.

Introduction:
When it comes to scrolling through content on a computer screen, there are two types of scrolling - vertical scrolling and horizontal scrolling. Vertical scrolling is used to move up and down the page, while horizontal scrolling is used to move left and right. In order to facilitate horizontal scrolling, a horizontal scroll bar is present at the bottom of the screen.

Horizontal Scroll Bar:
The horizontal scroll bar is a user interface element that appears at the bottom of the screen when there is content that extends beyond the width of the visible area. It consists of several components, including tab stop buttons, view buttons, split buttons, and indicators. These components serve different purposes and provide users with different functionalities.

Components of the Horizontal Scroll Bar:

1. Tab Stop Buttons:
- Tab stop buttons are located at both ends of the horizontal scroll bar.
- They allow users to quickly jump to the beginning or end of the content.
- By clicking on the left tab stop button, users can move to the leftmost part of the content, while clicking on the right tab stop button takes them to the rightmost part.

2. View Buttons:
- View buttons are placed to the left of the horizontal scroll bar, as mentioned in the question.
- These buttons allow users to change the view mode or zoom level of the content.
- By clicking on the view buttons, users can switch between different views, such as zooming in or out, fitting the content to the screen, or displaying multiple pages side by side.

3. Split Buttons:
- Split buttons are located at the right end of the horizontal scroll bar.
- These buttons provide additional options and functionalities related to the content being displayed.
- By clicking on the split button, a dropdown menu appears with various options for manipulating or interacting with the content.

4. Indicators:
- Indicators are small markers or icons that provide information about the current position or status of the content.
- For example, there may be an indicator showing the current page or location within a document.
- Indicators help users navigate and understand the context of the content they are viewing.

Conclusion:
In summary, the component that is placed to the left of the horizontal scroll bar is the view buttons. These buttons allow users to change the view mode or zoom level of the content being displayed. The other components of the horizontal scroll bar include tab stop buttons, split buttons, and indicators, each serving their own purpose in facilitating scrolling and interacting with the content.