1. A drought occured reducing the size of a large lake that was home to a species of aquatic snail in a very short period of time. The remaining population saw a drastic reduction in the gene pool and faced new selective pressures due to the lack water. Those snails that were drought tolerant sirvived and became a new species. This an example of what?    2. Chefs attract their mates by cooking a romantic meal, while musicians attract their mates by writing a romantic song. If a chef encounters a musician and fixes them a romantic meal, mating does not occur because musicians do not like romantic meals. This is an example of what?

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Sexual Motivation

Sexual motivation refers to a person's overall desire for sexual activity. It is an unusual motivation. Generally, among lower animals, the term 'drive' is commonly referred to as sexual motivation. It means a certain internal force drags the animal to be involved in reproductive behavior. On the contrary, humans are not simply driven by any internal force; rather, the sexual motivation in humans is due to several factors such as biological (hormones, genes), environmental (familial upbringing, chemical exposure) and physiological factors (culture, desire) which further determine engagement in sexual activities.