What this tests
Syllabus point 8.3 — Transpiration, in Transport in plants. Difficulty hard (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Biology 0610 · 8.3 Transpiration
June 2018 · Paper 21 · Question 16
One real Cambridge question from Transport in plants, with the official answer. Cambridge has printed this question 2 times.