Please help right answer only

the answer to your question is B

Prophase

Explanation:

During Prophade, the chromosones condense, the nucleous dissapears, and the nuclear envelipe breaks down

a catalyst

Explanation:

Catalyst is a substance that influences the rate of reaction without being consumed in the reaction. They increase the rate of reaction by decreasing the activation energy of the reaction. In biological system, enzymes are referred to as biological catalyst or biocatalyst. They are generally protein in nature and are very specific for their substrate. They also increases the rate of biological reaction by forming enzyme-substrate complex.

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