Final answer:
The statement is true. Angular rocks and boulders on high mountain peaks are often the result of frost shattering, a process where water freezes in the cracks of rocks and expands, breaking the rock apart.
Step-by-step explanation:
The statement that angular rocks and boulders on high mountain peaks were produced by frost shattering is True. Frost shattering, or freeze-thaw weathering, happens as water seeps into cracks in the rock and freezes. When water turns to ice, it expands by about 9%, exerting substantial pressure on the surrounding rock, which can lead to the breakage of the rock into angular fragments. This weathering process is particularly effective in mountainous regions where the temperature frequently oscillates above and below freezing, which is common at high altitudes. Over time, this shattering of rock contributes to the sculpting of the rugged mountain terrain, producing sharp peaks and angular boulders.
Reference to Figure 3 in the question's material highlights the visible impact of freezing and thawing on rocks in Iceland. Moreover, the information provided about mountains like the Rocky Mountains supports the notion that once formed, these structures are shaped over time by erosion and other weathering processes, including the actions of ice that lead to characteristics such as angular rocks.