The softening of nature ripe fruits is a natural process that occurs as the fruit ripens and becomes more edible. The correct answer is option 1, which states that the softening is due to the dissolution of the middle lamella.

The middle lamella is a layer of pectin that holds the cells of the fruit together. As the fruit ripens, enzymes are released that break down the pectin in the middle lamella. This result in the cells becoming loose and the fruit becoming softer.

Option 2, which suggests that the degradation of the primary wall is responsible for the softening, is not correct. While the primary wall may undergo some changes during the ripening process, it is not the primary cause of the softening.

Option 3, which mentions delignification, is also not correct. Delignification refers to the removal of lignin from plant cell walls, but it is not a process that specifically occurs during fruit softening.

Option 4, which suggests that the softening is due to the removal of suberin deposits in the cell wall, is also incorrect. Suberin is a waxy substance found in the cell walls of certain plant tissues, but its removal is not directly responsible for fruit softening.

In summary,