Which situation would lead to increased competitiona: a warm, sunny season, results in a bloom of algae growth in a fish habitatb: the amount of vegetation decreases due to a drought in a rabbit habitat. c: a long wet season results in a additional earthworm in a robin habitat d: a dry season results in additional open caverns for foxes to use as shelters

I would say B because c and d would decrease competition and a would do the same, or just kill the ecosystem.

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the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.