Looks like aphids to me. I'd blast them with the hose, a hard stream but not hard enough to knock the leaves off. Do that every couple/few days for a week or so, soon the ones you'll miss should be noticed and eaten by a "good" bug. Once you see those (likely ladybug larvae) at work, let them do their work. Your ROS looks really close to the wall, but pics can be deceiving. Does the sun shine on it all day?

It looks like a newborn rabbit/hare to me. Might have wandered out of its hole or maybe been stillborn?

In warm climates like mine, many people leave the blooms on the bushes. Especially old types of roses will still keep blooming, but you will get rose hips along with the new flowers. In the wintertime bushes covered with hips are very pretty. My hybrid musks, which have clusters of tiny blooms, make clusters of tiny hips which are so great looking I use them in flower arrangements. Rose hips are full of Vit C. In WW II, in England where they were short on food and everything they usually imported (because the Germans were torpedoing all of the ships), the govt. called on English gardeners to collect their rose hips for the govt to use to make Vit C. Since in England EVERYONE (practically) is a gardener with roses, this worked great. Jackie

Those are whiteflies laying eggs under your leaves. Whiteflies is my worst enemy, you need to get rid of them quick. They carry a disease called tomato yellow leaf curl virus. Once the plant is infected it may take up to 2 weeks to show symptom and then the plant is permanently stunted, you will not get any reasonable production out of them, even so the fruits won't taste good. My neighborhood was infested with it and it can be hard to get rid until I make changes to whole garden. I had to pull all plants they like to host on, nightshade plants (tomato, pepper, potatoes). They like laying eggs under banana leaves as well. They like warmth, calmness, shade, and humidity. They generally come around during damp weather, so good sun exposure and windy deter them a bit. I tried growing companion plants and they aren't even afraid of them, landing next to the rosemary. I apply cold pressed neem oil (not the cheap neem bought from Home Depot which is not effective) and pepper mint soap under all the leaves of all plants that they like to host on. I pretty much check for all traces of them under leaves and use my garden hose to spray the underside of all the plants. On dry days I also apply diatomaceous earth to the bottom of leaves which makes it harder for them to nest on. It's a constant battle of cleaning up the shades in the garden and routinely spraying to kill the eggs and disrupt their breeding cycle so you can slowly reduce their population. Fortunately they do not like cold so during winter most of them seems to go away. I couldn't grow tomatoes for an entire summer because of them, I make sure to not make the same mistake next summer and concentrate on growing other crops they aren't attracted to.