Which part of the Salesforce Lightning Design System (SLDS) should be used to create visual...

To create visual consistency with regard to alignments, grids, spacing, and typography, the part of the Salesforce Lightning Design System (SLDS) that should be used is utility classes. Utility classes are CSS classes that provide common styling properties, such as margins, paddings, borders, colors, fonts, and text alignments. Utility classes can be applied to any HTML element to quickly and easily adjust its appearance and layout. Utility classes follow the BEM (Block Element Modifier) naming convention, which makes them easy to read and understand. Utility classes can help the designer to create visual consistency across the Lightning components and pages, without writing custom CSS or overriding the component blueprints. References: : Utility Classes | Lightning Design System : UX Designer Certification Prep: Designing with Lightning Design System | Trailhead