The answer is C. The first option is highly unlikely, the second option is impossible, and C is a much more likely answer than D.
<span>Technological methods used to prove that plate tectonics occur include ocean floor mapping and tracking of earthquake</span>
On the one hand, the taking of the ball up the hill is analogous to the synthesis of glucose by plants. This is because it requires expending of energy (there is an intake of energy). Energy from the sun is required in photosynthesis. This is also tantamount to raising the potential energy for later use.
On the other hand, taking the ball down the slope of the hill is analogous to the breakdown of glucose. This is because energy is given out. When the ball is moved from the top of the hill (where it had more potential energy) to a lower point on the hill, energy has been given out just as energy is released in respiration.
ionic bonding.
Ionic bonding<span> is a type of </span>chemical bond<span> that involves the </span>electrostatic attraction<span> between oppositely charged </span>ions<span>, and is the primary interaction occurring in </span>ionic compounds<span>. The ions are atoms that have gained one or more </span>electrons<span> (known as </span>anions<span>, which are negatively charged) and atoms that have lost one or more electrons (known as </span>cations<span>, which are positively charged). This transfer of electrons is known as </span>electrovalence<span> in contrast to </span>covalence<span>. In the simplest case, the cation is a </span>metal<span> atom and the anion is a </span>nonmetal<span> atom, but these ions can be of a more complex nature, e.g. molecular ions like NH</span>4+<span> or SO</span>42−<span>. In simpler words, an ionic bond is the transfer of electrons from a </span>metal<span> to a </span>non-metal<span> in order to obtain a full valence shell for both atoms.</span>