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In the animal kingdom, parental roles can be very different. For example, some animals exhibit strong __(1)__ instincts, taking great care of their young. On the other hand, certain species display __(2)__ behaviors, where the males are the protectors of the group. Understanding these roles is __(3)__ for scientists studying animal behavior. Sometimes, however, the conditions these animals face can be __(4)__, such as harsh weather or lack of food. By observing these different behaviors, we can learn a lot about survival and adaptation in nature.

Choices:

a) maternal b) crucial c) masculine d) awful