Which process is shown in the figure below?

Arrange the events of opening stomata in correct sequence and choose the correct option accordingly.
$I.$ Lowering of osmotic potential of guard cells
$II.$ Decline in guard cell solute
$III.$ Rise of potassium ion level in guard cells
$IV.$ Guard cells absorb water from neighbouring epidermal cells
$V.$ Guard cells become flaccid
$VI.$ Guard cells swell and create a pore between them

$A$ metal ion involved in stomatal regulation is

By which process is water lost from the plants in the form of water droplets?

Observe the diagram and answer the following.
$(a)$ Which element plays an important role in the opening and closing of stomata?

Draw a labeled diagram of a dicot and a monocot stoma.