This is the 16942nd most frequent Russian word.
соответствующей
Corresponding; appropriate; relevant.
In this sentence, 'соответствующей' is used as an adjective that describes the necessity of the complexity being appropriate (matching the context of the task).
Для выполнения задачи необходимо использовать программу соответствующей сложности.
To complete the task, it is necessary to use a program of appropriate complexity.
Here, 'соответствующей' refers to the relevance or appropriateness of the theme to their interests and goals, indicating a correspondence.
Студенты выбрали тематику соответствующей их интересам и целям.
The students chose a theme appropriate to their interests and goals.
In this scenario, 'соответствующей' is describing expertise that matches or is suitable for addressing the issue presented.