Consider the simple true-or-false question: “Two perpendicular lines don’t intersect.” Your students easily select the correct answer (false). However, when you add the instruction “explain your answer in words,” You get all kinds of additional information. What kind of assesment method is shown here?

Which of the following activities is most likely to build the concept of 'Area' among students?

In figure I, a $24 \mathrm{h}$ clock is shown and in figure II and figure III, sleeping times of two animals X and Y are shown by shaded portions. Select the correct statements among the given options about the sleeping time of X and Y.