Meat is the correct answer
Gametogenesis, the production of sperm and eggs, involves the process of meiosis. During meiosis, two nuclear divisions separate the paired chromosomes in the nucleus and then separate the chromatids that were made during an earlier stage of the cell's life cycle.
From the given choices, the first that would be deposited by the river is the sand. This is because sand are comparatively smaller than all of the given substances. This makes it easier for river to transport it and deposit it.
White blood cells or WBCs are also known as leukocytes and these are the cells of the immune system. They serve as the soldiers inside our body that fight against infectious diseases and foreign invaders. WBCs are classified into different types. Some of them have multi-lobed nuclei, specifically, the neutrophils. It is the most abundant WBC in the body and they defend against bacterial and fungal infection. They have a multi-lobed nucleus, which consists of three to five lobes connected by slender strands. These multi-lobes are used for phagocytosis. Hope this answer helps.