A neap tide occurs when the Moon and the Sun are in quadrature. This condition is the time at which the line from the Earth to the Moon is at right angles to the line from the Earth to the Sun. Thus, the tide-producing effects of the Sun and the Moon cancel each other.
These unselfish acts<span> that help others in a group so that they increase their chances of surviving and reproducing would be caused by an altruistic behaviour. To add up, the behaviour mainly emphasises the principle of selflessness in which the welfare of other people was given importance than itself.</span>
