In the table, select the corresponding elements from the drop-down lists.

Solution:

• The table requires matching plant organs with their modified forms and functions.
• For the 'root' organ, the modified form is 'tuber' (корнеплод) and its function is 'participation in vegetative reproduction' (участие в вегетативном размножении).
• For the 'leaf' organ, the modified form is 'tendrils' (усы), and its function needs to be selected from the options.
• The options provided for the function of the modified leaf (tendrils) are: 'support of the stem in a vertical position' (поддержка стебля в вертикальном положении), 'protection from herbivorous pests' (защита от травоядных вредителей), and 'transport of water from the soil to aerial parts' (транспорт воды из почвы к надземным).
• Tendrils (усы) are modified leaves that help plants climb and support themselves, thus 'support of the stem in a vertical position' is the correct function.

Answer: The modified leaf (tendril) functions to support the stem in a vertical position.