HOTSPOT
You have a server named Servers that runs Windows Server 2012 R2. Servers has the Windows Deployment
Services server role installed.
Server5 contains several custom images of Windows 8.
You need to ensure that when 32-bit client computers start by using PXE, the computers automatically install
an image named Image 1.
What should you configure?
To answer, select the appropriate tab in the answer area.
Answer: 
I think it’s the BOOT tab. I’m saying that because once the client hits PXE, it’s going to load a boot image. If that boot image is a 32 bit image, then a 32 bit install image will follow.
Plus, here are pictures of the BOOT and CLIENT tabs.
http://www.deploymentresearch.com/Portals/0/Articles/WDSinWin8/WDS-ServerPropertiesBoot.png
http://prajwaldesai.com/wp-content/uploads/2013/03/Deploying-Windows-7-Using-Windows-Deployment-Services-Snap-6.jpg
Um, neither of those screenshots are from Windows Server 2012 R2. One looks to be 2008R2 and the other is from MDT. MDT is NOT WDS.
It’s the boot tab: https://technet.microsoft.com/en-us/library/cc772040%28v=ws.10%29.aspx
No its actually the Client tab. Boot tab specifies boot image. Meaning you can start different boot images / WinPE systems according to architecture. Which only means that for example 32 biut clients will start PE 3.0 and 64 bit will start WinPE 5.0. BUT on Client tab you can specify unattend file to use. Which means you can specify whichINSTALL image will be applied and what settings are applied to it.
I agree with the client tab due to the fact that the question said “the computers automatically installing image named Image 1” that means unattended…
There are two images being used: Boot and Install. Install means the client tab.