Can you retype this in> I don't understand exactly what you're trying to ask.
Answer:
The correct answer is C) Covalent bonds.
Explanation:
Water presents covalent polar bonds between oxygen and two hydrogens. This makes the molecule really strongly attached. Also the molecule presents a polarization where oxygen has two negative charges and each hydrogen has one positive charge so it's partially polarized but still the net charge is 0.
Uhm is there more information?
The birds are unable to get calcium from the soil because the calcium has been leached out by the acid rain.
Explanation:
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
