Zodula zotayidwa, zomwe kale zinali zofunika kwambiri pamapikiniki, maphwando, ndi makonzedwe azakudya, tsopano zasinthidwa ndi zosankha zachilengedwe monga ma seti odulira a PLA. Koma kodi ma seti odula a PLA ndi chiyani, ndipo chifukwa chiyani akusintha zakudya zokhazikika?