Correct Answer is C i.e encystment
During unfavourable conditions. Amoeba starts forming the cysts, this process is known as encystment. During encystment, a number of organelles such as cillia and flagella are reabsorbed and the Golgi apparatus secretes the cyst wall material, which is carried to the surface of Amoeba in vesicles. Cyst of Amoeba blown far and wide along the wind where Amoeba hatch out of these in favourable conditions. whereas skeletal muscle contraction mainly aids the blood flow in veins.