High temperatures increase reaction rates but lower rubisco selectivity for co2 versus o2. high leaf temperatures thus:

High temperatures increase reaction rates but lower rubisco selectivity for carbon dioxide versus oxygen. High leave temperature thus INCREASE PHOTORESPIRATION RATES.
Photorespiration rates is the rate at which a plant take up oxygen in the light and give out some carbon dioxide. It is a wasteful pathway which lead to the wasting of some of the energy produced by photosynthesis.

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.