D. the seasonal movement of organisims between locations
Find the attachment for the answer.
Note: I have added the complete question in the attachment.
<span>Gyri
and sulci are the folds and grooves,
respectively, which characterize the surface of the human brain.</span> Gyri
are part of the brain that shows a larger surface of the brain. When the gyri
change in structure or form it shows that a body is encountering sickness and
disorders. Sulci is one of the part of the cerebral cortex that surrounds the
gyri.
Eliminate B and D, not all single celled organism carry out through photosynthesis , they called singled celled organism and not work with other cell, it's either A and C, single celled organism is not a complex organism. so you can eliminate letter C.
so the best answer is A, although they have multiple organs system to maintain their internal stability.
The answer is catalysts. Catalysts speed up the rate of a <span>reaction</span> without<span> </span>getting consumed in the process. Catalysts,
in <span>this</span> case, enzymes act by reducing the
activation energy or changing the reaction mechanism (such as foregoing some transition
states). A popular enzyme is a <span>carbonic</span>
anhydrase that <span>catalyzes</span> the formation of
carbonic acid in the <span>blood</span> plasma (<span>from</span> carbon <span>dioxide</span>
and water), a critical function in regulating blood pH.
