Brick bonds: The bond in which every course contains both headers and stretchers is known as…

Introduction / Context:
Bonding patterns govern the structural interlock and appearance of brick masonry. Two classic bonds used in loadbearing and facing work are English and Flemish bonds. Knowing the difference supports correct specification, accurate quantity surveying, and quality control on site.

Given Data / Assumptions:

• Courses are horizontal layers of bricks.
• Headers show the brick's short face; stretchers show the long face.
• Bond types are defined by the arrangement of headers and stretchers within and between courses.

Concept / Approach:
In Flemish bond, each course alternates headers and stretchers along its length, and headers in one course are centered over stretchers in the course below (and vice versa). English bond, by contrast, alternates full courses of headers with full courses of stretchers. “Russian” and “mixed” are not standard loadbearing bond names in common practice; garden-wall bonds are variants for half-brick walls, not the general two-brick-thick construction implied here.

Step-by-Step Solution:
Identify the defining phrase: both headers and stretchers appear in every course.Map to bond type: this is Flemish bond.Exclude English bond which alternates by course rather than within a course.Select “Flemish bond.”

Verification / Alternative check:
Illustrations in building construction texts show the distinctive Flemish pattern, valued for aesthetics on facades.

Why Other Options Are Wrong:
English bond: Headers and stretchers in separate courses, not in the same course.Russian/Mixed: Nonstandard or vague labels.English garden wall bond: A variant for thinner walls, not the general definition in the question.

Common Pitfalls:
Confusing “course-by-course alternation” (English) with “within-course alternation” (Flemish).

Final Answer:
Flemish bond.