The student effectively incorporates relevant and appropriate source material throughout the essay, referencing secondary sources such as Rognmo et al. (2004), Chidnok et al. (2020), and Tjønna et al. (2008) to address the research question. The majority of the primary material comes from reputable scientific research publications, demonstrating a focus on accredited sources. Additionally, the essay maintains an academic and analytical tone without being overly saturated with technical terms, and the use of symbols, equations, and units is generally appropriate and consistent, although some improvement in the consistency of significant figures is needed in certain sections.