The following inequalities would represent the graph shown is

The graph you provided shows that the function f(x) is always greater than or equal to the square root of 1-x. This means that the correct inequality is:

The other three inequalities are not correct because they do not match the graph.
For example, the inequality
would mean that the function is always less than or equal to the square root of 1-x, but the graph shows that the function is sometimes greater than the square root of 1-x.
Therefore, the answer is
