Answer:
Hey Grandma,
I hope your doing good. I need to tell you about something that might help you to increase your energy. I noticed that you have been kind of slow lately. I have been studying about how being active can give you numerous benefits, like more energy. Being more active helps to build muscle and process vitamins and minerals. It has also been proven to reduce the risk of certain heart problems and cancer, and I want to make sure you know how much this is important to me. I want you to be more active regularly, because it will help you to feel better and I want you be happy.
I love you and I hope you know that.
Sincerely,
(Write name)
Step-by-step explanation: