Fats that are of animal origin and are soild at room temp?

Not always. Saturated fats are solid at room temperature. Poly-unsaturated fats, primarily vegetable oils, are liquid at room temperature.

However, monounsaturated fats, olive oil and safflower oil are high in monounsaturated fats, are in both vegetable and animal matter. Pork fat (lard, unrendered), among animal fats, is highest in monounsaturated fats at nearly 65%. Yes, that is the good fat, however at 35% saturated fat, pork fat is not a better alternative to vegetable oils. And keep in mind that rendered fats are more concentrated forms of saturated fats than the natural fats, thus rendered lard is nearly 95% saturated fat produced from pork fat.