The telomere-shortening process is referred to as telomere attrition.
Telomere attrition can lead to:
Apoptosis - cell death
Senescence - loss of ability to divide
Cancerous Cells - divide excessively
Essentially, when telomeres become too short, cells either die,
become useless or even actively harmful to the body.
Eventually all three things will lead to cell death, leaving the
body vulnerable to diseases and illnesses which defines the
biological process of aging.
In Summary, biological aging is the degeneration in bodily functions
through the loss of organ and tissue function.
This is contributed to by telomere attrition as telomere shortening
results in cell death.