The correct answer should be loss.
When your skin is cut open, obviously a little blood will run out as a result of that. This case is no different - the person who fell and has an abrasion on the knee will experience a slight loss of blood through that tiny wound which is the result of them falling on the ground.
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<span>If at the end of the chromatography process there is an observation that the solution is bright green, the most likely explanation is the presence of Chlorophyll a.</span>
