The joy part of today is just seeing them both do things together . Yesterday Alex was trying to get Ethan to play with the cars like he does . Rolling them on the ground under the table at that moment .

Question: Why is seeing the two play well together the joyful part of the speaker 's day ?
Answer: It is encouraging to see the boys get along and it makes the speaker feel gratefulThey are excited to see that the two new employees will be a good fit for the teamNone of the above choices .They are the boy 's teacher and feel hopeful that the class will now be more peaceful