Answer:
Step-by-step explanation:
The answer is C
calcium is in shells and bones
eqaution 1: Proportinal
eqaution 2:Proportinal
in my knowledge
26 , 31 , 36 , 41 , 46
rule:5
cause 26+5=31
31+5=36
36+5=41
41+5=46 and so on...