Im going to go with C only because most dont make sense.
The cramps can be caused due to anaerobic respiration in the muscles and lactic acid formation.
During intense physical activity the muscles become deprived of oxygen, in this condition, anaerobic respiration takes place in the muscle cells causes the formation of the lactic acid.
The physical training increases the strength of the muscles, which can help the muscles not to get tired easily. that is why, physical training is required before any marathon.
The process by which an endospore rehydrates and begins cellular metabolism is termed germination.
Endospore is the dormant form of asexual reproductive structure. It has a tough outer layer that is resistant to various unfavorable conditions, harmful chemicals, therefore protecting the inner contents. The endospore's tough layer breaks off only when the favorable conditions arrive.
Germination is the process where the dormancy of a seed or a spore breaks off and the enzymes present inside get activated. The outer protective payer of the endospore breaks off. After that the spore regains all its functionalities and the cell division begins.
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Liches, mosses, grasses and annual flowers, bushes and shrubs, trees. Primary succesion is a type of succesion occuring in an environment. This is a gradual growth of ecosystem from an area without vegatation. This can happen from simple to a more complex organism. The pioneer plants are usually the hard organism that can strive at aharsh condition and gradually shifting to a more adapted to less harsh conditions.
