سؤال قراءة ستيب محلول — فهم التفاصيل (تدريب 5702)

Bar chart (no printed numeric data labels; values below are visually estimated from bar heights against gridlines at 0/500/1000/1500/2000/2500). Freshwater levels by country, for years 1967, 1977, 1987, 1997, 2007, 2011: Algeria: ≈800, ≈600, ≈500, ≈400, ≈300, ≈250. Egypt, Arab Rep.: ≈50, ≈40, ≈30, ≈20, ≈15, ≈10 (all bars near zero). Morocco: ≈2000, ≈1600, ≈1200, ≈1000, ≈850, ≈800. Asoudi Arabia: ≈500, ≈300, ≈200, ≈100, ≈80, ≈70. Syrian Arab Republic: ≈1200, ≈850, ≈600, ≈480, ≈380, ≈400. Tunisia: ≈800, ≈680, ≈550, ≈480, ≈450, ≈430.