The answer is
B. Beak shape
This is because in various areas the beaks were different shapes
Explanation:
the correct answer is D sharing of electrons between two atoms
The plasma membrane is described as a fluid mosaic model because its made up of a phospholipid bilayer, allowing it easily to bend and move along without breaking or ripping the membrane due to the hydrophobic and hydrophilic poles of the bilayer.
i believe its IB IB and IBi aka choice B
