What's your question? Ask

Try adding a bit more nitrogen-rich fertilizer and see if this helps with the greening up of the foliage. If not, it may just be the type of basil you have and is no indication of there being anything wrong as long as it appears healthy otherwise.

You don't have to bring it inside. You need only make sure that the plant has sufficient water and in your case, perhaps a bit of afternoon shade to ease the stress of high temps. In conditions like yours, they should be watered twice a day.

The following articles should be helpful to you: https://www.gardeningknowhow.com/edible/vegetables/vgen/vegetable-garden-soil.htm, https://www.gardeningknowhow.com/edible/herbs/basil/how-to-grow-basil-plants.htm, https://www.gardeningknowhow.com/edible/vegetables/leeks/how-to-grow-leeks-and-tips-for-harvesting-leeks.htm

Gay Schoenknecht is ASKING the question.

This may be your problem: https://www.gardeningknowhow.com/plant-problems/disease/black-spot-fungus.htm

When you use a home made pesticide, you know what's in it, and you know whether or not anything in it will harm you. Here are some good recipes: https://www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm
In the case of slugs, the repellent is sprinkled on the soil around the plant, and acts on the slugs when they crawl through it, so it's nothing that is absorbed into the plant, so the plant is safe to eat.