Answer: Chemical bonding
Explanation: Bonding by sharing electrons is known as covalent bonding and bonding by transferring electrons is known as ionic bonding. Both are a type of chemical bond that bond elements together into molecules.
The correct answer is B. Natural selection occurs through generations and is in which organisms best suited to their environment survive.
There are over 400 breeds of dogs in the world and all are maintained as pure-bred stocks through selective breeding,which aims to maintain a closed genetic lineage. Most dog traits follow simple genetic rules.