Humans purposely change genes to get more favorable traits.
Answer
B. Spell checker
Explanation
Spell checker is a program designed to identify misspelled words and notify the writer about the mistake. The programs can further auto correct the word or allow the writer to choose from various corrections of the word. In Microsoft, a red underline appears on the misspelled word to display the error.
Various teratogens to the pre-natal environment can lead to dangers like causing breathing problems and lungs definicy
