Which major legislation passed in 1973 primarily protects biodiversity?

toxic substances control act
national environmental policy act
the endangered species act
resource conservation and control act

Option C, the Endangered Species Act

Explanation:

The main objective of “The Endangered Species Act 1973” is to restrict the killing, import and sale of endangered species across the world. The act has introduced following regulations –  

a)Specified the class of fauna and flora for protection and preservation

b)Authorized the federal to conserve the listed species

c)Authorized the funding authorities to capture land for conserving the foreign species

All these regulations were introduced to save the endangered species and stabilize the biodiversity or else these endangered species of plant and animals may become extinct in near future.

All other acts given in the option A, B, and D have provisions for protecting and preserving the environment as a whole and are not intensively focused towards protection of biodiversity.

Thus option, C is correct

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.