Boiling point is a physical property that depends on the strength of intermolecular forces between molecules. In this case, we need to determine which compound among H2O, H2S, H2Se, and H2Te has the highest boiling point.

Hydrogen bonding:
- Hydrogen bonding is a special type of intermolecular force that occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen, nitrogen, or fluorine) and is attracted to another electronegative atom in a nearby molecule.
- Hydrogen bonding is stronger than other intermolecular forces, such as London dispersion forces or dipole-dipole interactions.
- It results in higher boiling points for compounds that can form hydrogen bonds.

Molecular weight:
- Molecular weight refers to the sum of the atomic weights of all atoms in a molecule.
- Generally, as the molecular weight increases, the boiling point also increases due to stronger intermolecular forces.

Considering these factors, let's analyze each compound:

H2O (water):
- Water can form hydrogen bonds due to the presence of highly electronegative oxygen atoms.
- The molecular weight of water is 18 g/mol (2 hydrogen atoms + 1 oxygen atom).
- Water has the highest boiling point among the given compounds because of its ability to form multiple hydrogen bonds, resulting in strong intermolecular forces.

H2S (hydrogen sulfide):
- Hydrogen sulfide can also form hydrogen bonds due to the presence of highly electronegative sulfur atoms.
- The molecular weight of hydrogen sulfide is 34 g/mol (2 hydrogen atoms + 1 sulfur atom).
- Although hydrogen sulfide can form hydrogen bonds, its boiling point is lower than that of water because sulfur is less electronegative compared to oxygen.

H2Se (hydrogen selenide):
- Hydrogen selenide can also form hydrogen bonds due to the presence of highly electronegative selenium atoms.
- The molecular weight of hydrogen selenide is 81 g/mol (2 hydrogen atoms + 1 selenium atom).
- Hydrogen selenide has a lower boiling point than water because its molecular weight is higher but it can still form hydrogen bonds.

H2Te (hydrogen telluride):
- Hydrogen telluride can also form hydrogen bonds due to the presence of highly electronegative tellurium atoms.
- The molecular weight of hydrogen telluride is 130 g/mol (2 hydrogen atoms + 1 tellurium atom).
- Hydrogen telluride has the highest molecular weight among the given compounds, but its boiling point is lower than that of water due to weaker intermolecular forces compared to water's hydrogen bonding.

Therefore, the correct answer is option 'A': H2O has the highest boiling point among H2O, H2S, H2Se, and H2Te due to its ability to form strong hydrogen bonds.