Explanation:
in the circumstances in which the attempts do not contravene the ethical and judicial laws.
Answer:
depending on certain variables... you could create a laser
The answer is play on words, or a pun - a row of large animals separating two yards is called an elefence.
The first part of the word, ele-, obviously refers to elephants, which are large animals. The second part is a fence, which separates two yards. So this is intended to have a humorous effect.
A ridge would be formed by a divergent boundary
I think it’s “a target cell with the right receptor”