Delete option is not coming on A5

[AC Question]

These are not picasa pics.. these pics are taken by the same mobile A5.. in gallery there is no delete or remove option.. i want this option in my mobile.. and also my old pictures are coming in gallery.. why tat are coming even i dont want that.. Kindly assist me to solve this issue..

 

[RogMoore]

Try to recover it with some third party app like Recuva in PC.