A The first step in the process of writing a business analysis report is business understanding, which contains three sub-steps: the first sub-step is to fully understand the intent of the demanding party through communication; the second sub-step is to understand the position of the demanding party after determining the problem; the third sub-step is to design a good analytical report framework and positioning after sufficient business understanding. The behavior in the question is the first sub-step of business understanding, choose A.

正確答案是A: Business understanding。

專業(yè)分析：
在編寫商業(yè)分析報(bào)告的過(guò)程中，了解業(yè)務(wù)需求和目標(biāo)是至關(guān)重要的第一步。這個(gè)步驟被稱為“業(yè)務(wù)理解”（Business understanding）。在這個(gè)階段，分析師需要與相關(guān)部門（如營(yíng)銷部門）溝通，以明確活動(dòng)或項(xiàng)目的目的、目標(biāo)、期望的結(jié)果以及相關(guān)的業(yè)務(wù)背景。

在題目中，購(gòu)物中心的數(shù)據(jù)分析師找到營(yíng)銷部門以了解“女神節(jié)”活動(dòng)的目的，這正是業(yè)務(wù)理解階段的典型行為。通過(guò)這種溝通，分析師可以更好地理解活動(dòng)的背景和預(yù)期效果，從而為后續(xù)的數(shù)據(jù)收集、分析和報(bào)告撰寫奠定基礎(chǔ)。

因此，數(shù)據(jù)分析師與營(yíng)銷部門溝通以了解活動(dòng)目的的行為屬于“業(yè)務(wù)理解”步驟。