What is the most challenging issue facing genome sequencing?
the inability to develop fast and accurate sequencing techniques
the ethics of using information from genomes at the individual level
the availability and stability of dna
all of the above

the ethics of using information from genomes at the individual level

Explanation:

The human genome project (PGH) aims to identify all genes responsible for our normal and pathological characteristics. Long-term results will surely revolutionize medicine, especially in the area of prevention. Thousands of genes can be analyzed at the same time, and people will be able to know if they have an increased predisposition to certain diseases, such as diabetes, cancer, hypertension, or Alzheimer's disease, and treat themselves before symptoms appear.

Alongside these advances, numerous ethical issues are already being discussed and others will arise. These ethical issues are a major challenge to human genome sequencing, and among these issues, the ethics of using genome information at the individual level have been the most challenging.

preservation because he preserves part of the land and preserves means save

explanation:

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"