How could Noah's Ark carry this huge number of creatures, and is it permissible for a woman to refuse her husband's request for intimacy, and what is the wisdom behind the prohibition of her refusal?

Among the virtues of Islamic law and its fulfillment of human needs is that the family system achieves affection and harmony between spouses, and each finding chastity with the other. If the husband wishes to have intercourse with his wife, she is not permitted to refuse, provided she is able and has no valid excuse; otherwise, she would undermine the interest and neglect the husband's right. This is contingent upon her ability and the absence of a valid excuse. Likewise, it is the wife's right that her husband provides her with chastity. So, if she needs intercourse, it is obligatory upon him to fulfill it, as long as he is able, according to the preponderant opinion.