Please help :)
1: Catalysts lower the activation energy of chemical reactions. How does this benefit the environment?

2: Chlorine free radicals are produced in the upper atmosphere when ultraviolet radiation interacts with chlorofluorocarbons (CHCs). The free radicals catalyze the conversion of ozone to oxygen. How is this catalysis harmful to humans

1. By using less energy, reactions that are catalysed are also more sustainable, and therefore better for the environment.

2. By catalysing the conversion of ozone into oxygen, the ozone layer sees a reduction, also reducing the amount of protection from direct UV rays given to humans and other forms of life by the ozone layer.

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

yes they ca   is ur ansswerrr