This is an improvement in the well-being of human beings

Preservation of ecosystems.

Explanation:

The preservation of ecosystems provides better well-being for humans, because this preservation provides a cleaner and purer environment, allowing humans to have good access to quality natural resources such as high air quality and availability of adequate food, which allows a better coexistence and a less stressful environment, promoting a high level of well-being.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

trachea, alveoli, lung capillaries, arteries