How does an atom become a positive ion? A- It loses an electron,
B- It gains an electron,
C- It gains a neutron,
D- It loses a neutron

A- It loses an electron,

Explanation:

When one or more electrons is knocked off of an atom, it becomes positively charged. It is now an positive ion.

Hope this helps :)

~Blazetoxic123~

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

it's c. (to reduce the greenhouse effect/carbon gasses)