Which of the following factors determines how harmful an introduced chemical will be on the environment? a. type of chemical b. concentration c. weather conditions d. all of the above Please select the best answer from the choices provided A B C D

Option D

Explanation:   Chemicals are usually defined as those substances that are     comprised of matters and have a certain chemical composition. Almost all    living and non-living things are made up of chemicals. They are very  extensively used in all the products. These chemicals are both helpful as well as harmful to different life forms.

These chemicals can be harmful to an environment if the chemical is comprised of toxic elements and in greater amount.

D.  All of the above

Step-by-step explanation:

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation:

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: