Someone pl0x me with this question

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

What is true of sea slugs in these orders

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water