Ateacher who a toddler place shape blocks into a puzzle and periodically looks up to scan the remainder of the room, make eye contact, and smile at other children who are playing is likely doing which of the following?

a. maintaining attention for safe supervision between the individual and the group
b. failing to position herself/himself appropriately
c. attending to the needs of the individual but not the group
d. relying on another adult in the classroom to maintain safe supervision

A. Maintaining attention for safe supervision between the individual and the group

Explanation:

By helping the toddler with the puzzle and periodically looking up to scan the reminder of the room, the teacher maintains attention for safe supervision between the toddler and the group

probably 3 since archeologists and historians don’t understand there writing.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.