I had the same question and the answer was C OR A.
The tiny solid particles which play in the cloud formation are solvents.
Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The process which helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II, is crossing over (C). Crossing over is the exchange of genetic material between two homogenous chromosomes. It is one of the final phases of prophase I. This process is called synapsis. It occurs when the matching regions on the matching chromosomes break and then reconnect to the other chromosome
The answer is; anaphase
Cytokinesis is the process in which the mother cell divides into daughter cells. This begins with the partitioning of the cytoplasm, then the cell membrane. During anaphase, the chromosomes are moved towards different poles of the cells using spindle fibers. Cytokinesis also begins in this phase and ends during telophase.