The correct response is: The student is correct; amoebas are probably alive because they have reproductive capabilities and create offspring through reproduction.
Amoebas are indeed alive. They are unicellular organisms that can reproduce asexually by splitting into two, which is a form of reproduction. The fact that they can create offspring, even as single cells, indicates that they are living organisms. The student's assertion about amoebas being alive is rooted in their ability to carry out life processes such as reproduction.