A question that begs answering.
Everything to humans is language.
WHY – the ability to distinguish and care about future outcome, ie. weigh memories and desires, is one mark of a highly functional survival instinct
ARE – the re-affirmation of the concept of historical plurality implies both trust in the pattern of plurality as stable system AND conscious will for it to remain so.
WE – relating to your own species in terms of self including plurality marks you as a sensitive and caring individual capable of existing as individual in a community
HERE – the spacial destinction, whether it springs from accurate astronomy or not, implies a great sense of identity, ie. Me vs. Not-Me, which by way of physical identification contains the unconditionality of existential loneliness that has often been described as a Human Driving Force towards mergence into safe communality
ON – a subset of “here”, but by implication the demonstration of astronomical awareness, and as such an underlining of trust in the existance of the human form and its difference from everything not human
THIS – another subset of “here”, but easily the essence of the totality of the question, showing the capacity for projected thought that shines the light on what is and the functionality of what is, which marks the clear distinction between simple survival AND creating life
PLANET – a word simultaneously describing the concept of “rock existing in nothingness, preferably with the ability to sustain life, preferably human life, but not necessarily”, AND the mental understanding of the totality of the human habitat with all of its complexity and challanges. Used in this context it also implies an uncertainty of “home”, ie. “possibly we can do so much better for our selves that Earth as “home” for all humans becomes a natural thing”.
And all put together it forms an image of self aware existance capable of projecting itself to a future of better conditions for all members of its species. Emphatically speaking this projection is its own fuel, and the simple frasing of the question nothing but the hose that goes into the tank: Don’t expect the question answered by anyone but yourself, but always keep it warm and in the spotlight.