Observe the given figure and answer the following:

Co-ordinate of $B$

Observe the given figure and answer the following:

Abscissa of point $D$

Observe the given figure and answer the following:

Ordinate of point $H$

Observe the given figure and answer the following:

Points with the same abscissa.

Observe the given figure and answer the following:

Points with the same ordinate.

Plot the following points in a graph and write the name of the figure thus obtained:

$P\left(\mathrm{2,1}\right), Q\left(3,-1\right), R\left(-1,-1\right), S(-\mathrm{2,1.5})$