make left curly bracket encompass three lines

I can think of two ways.

The first way is quick-and-dirty, but it isn't very stable if the document will be edited again later.

• Type the words on separate lines, pretty much the way you typed them here.
• Put the cursor in the middle line.
• On the Insert tab, click Shapes. In the Basic Shapes group, click the left bracket (the next-to-last item in the group).
• Drag a rectangle as tall as the three lines of text, and as wide as you want the bracket to be. Initially the bracket will be partly obscured by the drawing handles on the rectangle, but those will disappear when you click elsewhere.

The second method takes a little longer to do, but its results will look better and won't get messed up by other editing.

• Press Alt+= to insert an equation box.
• On the Equation Tools tab, click Normal Text (near the left end). In the equation box, type the word to the left (in the example, "house").
• On the Equation Tools tab, click the Bracket button. Scroll down the gallery and click the icon for the single left bracket, which is accompanied by a little placeholder box.
• Click inside the placeholder box. On the Equation Tools tab, click the Matrix button and click the icon for the three boxes set up vertically. Now your placeholder box has turned into three placeholder boxes, and the bracket has stretched to the proper height.
• Right-click any of the three placeholders, click Column Alignment, and click Left.
• Click in each of the three placeholder boxes in turn, click Normal Text, and type the word that you want there.