Based on studies of isolated and institutionalized children, what is the key variable in acquiring the basic "human" traits we take for granted?

The key variable in acquiring the basic human traits we take for granted is that through the studies of institutionalized children, we can see that it demonstrates that some characteristics are being taken for granted of which are as being of human traits that result not from basic instinct but rather from the early close relations that is associated with other humans.

permafrost layer, it exists beneath a layer of soil, rock or sediment.

answer; utilitarian;