** will mark brainliest ** which of the following explains how aquatic animals in the arctic and antarctic survive at subzero temperatures? a. water exhibits higher density in its solid state, allowing ice to float on top. b. water freezes from bottom upward, forming an insulating layer of ice at the bottom. c. water expands on cooling below 4 °c, increasing in volume until it reaches 0 °c. d. the low specific heat of water lets it cool down slowly, allowing aquatic animals to survive.

It is c I hope I helped out with this question!.

C. Water expands on cooling below 4 °C, increasing in volume until it reaches 0 °C.

Explanation:

The volume occupied by ice is greater than the volume of water.

The maximum density of water is at 4°C.

The hydrogen bond in ice gives it an open cage like structure which makes it volume higher and density lower as compared to liquid water. As we increase the temperature the volume decreases due to breaking of these bonds so its density increases till 4°C. After this temperature the increase in volume due to change in state is more and thus its volume increases and density decreases.

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.