Precocial and Altricial Young

Different animal species undergo different developmental strategies, and these strategies are mainly classified into two categories: precocial and altricial. The former development signifies the idea of early maturity, whereas the latter one implies that the young greatly rely relies on their parents after birth. The distinction between the two strategies is are represented most clearly in birds, and each strategy  way has its own advantages and drawbacks. For instance, precocial birds are well formed almost grown up within the egg so that they exit the nest soon, but the mother requires huge amounts of energy during gestation. On the contrary, altricial birds are weak and helpless upon hatching, yet their brain size becomes relatively larger than those of precocial chicks birds due to postnatal growth. In reality, however, most species have partial aspects of both types of developmentprocedures.

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Precocial and Altricial Young

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For instance, precocial birds are almost grown up within the egg so that they exit the nest soon, but the mother requires huge amounts of energy during gestation. On the contrary, altricial birds are weak and helpless upon hatching, yet their brain size become relatively larger than those of prococial birds due to postnatal growth. In reality, however, most species have partial aspects of both procedures.

This is a summary of an essay. I would really appreciate any recommendation or modification to this passage.