This means that a single carbon atom can form up to tetravalent bonds with other atoms
1st image I think would be the answer
The range of temperatures in which an insect is able to live and reproduce is one element of that organism's niche, a description of its ecological requirements.
There are no choices but the reason why we tend to value
friends as we grow older is because these are bonds that we create on our
own. These are people who have been
there for us throughout our lives. They are our link with the outside world
since they are not our family members.
The longer we are friends with others, the deeper that bond becomes.
